21012031011232 has 48 divisors (see below), whose sum is σ = 41534752984200. Its totient is φ = 10463558533120.

The previous prime is 21012031011199. The next prime is 21012031011233. The reversal of 21012031011232 is 23211013021012.

It can be written as a sum of positive squares in 4 ways, for example, as 20010198172176 + 1001832839056 = 4473276^2 + 1000916^2 .

It is not an unprimeable number, because it can be changed into a prime (21012031011233) 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, 18039744 + ... + 19169152.

Almost surely, 2^{21012031011232} is an apocalyptic number.

It is an amenable number.

21012031011232 is a deficient number, since it is larger than the sum of its proper divisors (20522721972968).

21012031011232 is a wasteful number, since it uses less digits than its factorization.

21012031011232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131769 (or 1131761 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21012031011232 its reverse (23211013021012), we get a palindrome (44223044032244).

The spelling of 21012031011232 in words is "twenty-one trillion, twelve billion, thirty-one million, eleven thousand, two hundred thirty-two".