21021331002132 has 12 divisors (see below), whose sum is σ = 49049772338336. Its totient is φ = 7007110334040.

The previous prime is 21021331002079. The next prime is 21021331002137. The reversal of 21021331002132 is 23120013312012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21021331002099 and 21021331002108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021331002137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875888791744 + ... + 875888791767.

Almost surely, 2^{21021331002132} is an apocalyptic number.

It is an amenable number.

21021331002132 is an abundant number, since it is smaller than the sum of its proper divisors (28028441336204).

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

21021331002132 is a wasteful number, since it uses less digits than its factorization.

21021331002132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751777583518 (or 1751777583516 counting only the distinct ones).

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

Adding to 21021331002132 its reverse (23120013312012), we get a palindrome (44141344314144).

The spelling of 21021331002132 in words is "twenty-one trillion, twenty-one billion, three hundred thirty-one million, two thousand, one hundred thirty-two".