21001233130032 has 20 divisors (see below), whose sum is σ = 54253185586040. Its totient is φ = 7000411043328.

The previous prime is 21001233129889. The next prime is 21001233130039. The reversal of 21001233130032 is 23003133210012.

It is a junction number, because it is equal to n+sod(n) for n = 21001233129990 and 21001233130008.

It is not an unprimeable number, because it can be changed into a prime (21001233130039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218762845057 + ... + 218762845152.

It is an arithmetic number, because the mean of its divisors is an integer number (2712659279302).

Almost surely, 2^{21001233130032} is an apocalyptic number.

It is an amenable number.

21001233130032 is an abundant number, since it is smaller than the sum of its proper divisors (33251952456008).

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

21001233130032 is a wasteful number, since it uses less digits than its factorization.

21001233130032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437525690220 (or 437525690214 counting only the distinct ones).

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

Adding to 21001233130032 its reverse (23003133210012), we get a palindrome (44004366340044).

The spelling of 21001233130032 in words is "twenty-one trillion, one billion, two hundred thirty-three million, one hundred thirty thousand, thirty-two".