33231021132 has 12 divisors (see below), whose sum is σ = 77539049336. Its totient is φ = 11077007040.

The previous prime is 33231021107. The next prime is 33231021139. The reversal of 33231021132 is 23112013233.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33231021132² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33231021099 and 33231021108.

It is not an unprimeable number, because it can be changed into a prime (33231021139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384625869 + ... + 1384625892.

Almost surely, 2^33231021132 is an apocalyptic number.

It is an amenable number.

33231021132 is an abundant number, since it is smaller than the sum of its proper divisors (44308028204).

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

33231021132 is a wasteful number, since it uses less digits than its factorization.

33231021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769251768 (or 2769251766 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 33231021132 its reverse (23112013233), we get a palindrome (56343034365).

The spelling of 33231021132 in words is "thirty-three billion, two hundred thirty-one million, twenty-one thousand, one hundred thirty-two".