1121231310 has 16 divisors (see below), whose sum is σ = 2690955216. Its totient is φ = 298995008.

The previous prime is 1121231303. The next prime is 1121231317. The reversal of 1121231310 is 131321211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1121231303) and next prime (1121231317).

It is a super-2 number, since 2×1121231310² = 2514319301048632200, 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 1121231310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121231317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18687159 + ... + 18687218.

It is an arithmetic number, because the mean of its divisors is an integer number (168184701).

Almost surely, 2^1121231310 is an apocalyptic number.

1121231310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121231310 is an abundant number, since it is smaller than the sum of its proper divisors (1569723906).

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

1121231310 is a wasteful number, since it uses less digits than its factorization.

1121231310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37374387.

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

The square root of 1121231310 is about 33484.7922197525. The cubic root of 1121231310 is about 1038.8792506289.

Adding to 1121231310 its reverse (131321211), we get a palindrome (1252552521).

The spelling of 1121231310 in words is "one billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred ten".