1123131302120 has 48 divisors (see below), whose sum is σ = 2547101565540. Its totient is φ = 445714843392.

The previous prime is 1123131302087. The next prime is 1123131302129. The reversal of 1123131302120 is 212031313211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1065028128004 + 58103174116 = 1032002^2 + 241046^2 .

It is a super-2 number, since 2×1123131302120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1123131302092 and 1123131302101.

It is not an unprimeable number, because it can be changed into a prime (1123131302129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225269 + ... + 1515588.

Almost surely, 2^{1123131302120} is an apocalyptic number.

1123131302120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123131302120 is an abundant number, since it is smaller than the sum of its proper divisors (1423970263420).

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

1123131302120 is a wasteful number, since it uses less digits than its factorization.

1123131302120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741122 (or 1740991 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1123131302120 its reverse (212031313211), we get a palindrome (1335162615331).

The spelling of 1123131302120 in words is "one trillion, one hundred twenty-three billion, one hundred thirty-one million, three hundred two thousand, one hundred twenty".