1123121310 has 64 divisors (see below), whose sum is σ = 2807529984. Its totient is φ = 287280000.

The previous prime is 1123121287. The next prime is 1123121333. The reversal of 1123121310 is 131213211.

It is a happy number.

1123121310 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1123121287) and next prime (1123121333).

It is a super-2 number, since 2×1123121310² = 2522802953952232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1123121310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71685 + ... + 85935.

It is an arithmetic number, because the mean of its divisors is an integer number (43867656).

Almost surely, 2^1123121310 is an apocalyptic number.

1123121310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123121310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403764992).

1123121310 is an abundant number, since it is smaller than the sum of its proper divisors (1684408674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123121310 is a wasteful number, since it uses less digits than its factorization.

1123121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1123121310 is about 33513.0021036612. The cubic root of 1123121310 is about 1039.4626507869.

Adding to 1123121310 its reverse (131213211), we get a palindrome (1254334521).

The spelling of 1123121310 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred ten".