21311330100232 has 32 divisors (see below), whose sum is σ = 40078704514680. Its totient is φ = 10623685754880.

The previous prime is 21311330100227. The next prime is 21311330100241. The reversal of 21311330100232 is 23200103311312.

It can be written as a sum of positive squares in 4 ways, for example, as 14772845854116 + 6538484246116 = 3843546^2 + 2557046^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16177432 + ... + 17445112.

Almost surely, 2^{21311330100232} is an apocalyptic number.

It is an amenable number.

21311330100232 is a deficient number, since it is larger than the sum of its proper divisors (18767374414448).

21311330100232 is a wasteful number, since it uses less digits than its factorization.

21311330100232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273993 (or 1273989 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21311330100232 its reverse (23200103311312), we get a palindrome (44511433411544).

The spelling of 21311330100232 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirty million, one hundred thousand, two hundred thirty-two".