13121231232 has 64 divisors (see below), whose sum is σ = 34883987760. Its totient is φ = 4369889280.

The previous prime is 13121231141. The next prime is 13121231239. The reversal of 13121231232 is 23213212131.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×13121231232² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13121231199 and 13121231208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121231239) 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, 439038 + ... + 467970.

Almost surely, 2^13121231232 is an apocalyptic number.

13121231232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121231232 is an abundant number, since it is smaller than the sum of its proper divisors (21762756528).

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

13121231232 is a wasteful number, since it uses less digits than its factorization.

13121231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30131 (or 30119 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 13121231232 its reverse (23213212131), we get a palindrome (36334443363).

The spelling of 13121231232 in words is "thirteen billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-two".