21212013032 has 32 divisors (see below), whose sum is σ = 45506248320. Its totient is φ = 9080475840.

The previous prime is 21212013019. The next prime is 21212013073. The reversal of 21212013032 is 23031021212.

It is a self number, because there is not a number n which added to its sum of digits gives 21212013032.

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, 166844 + ... + 265067.

It is an arithmetic number, because the mean of its divisors is an integer number (1422070260).

Almost surely, 2^21212013032 is an apocalyptic number.

It is an amenable number.

21212013032 is an abundant number, since it is smaller than the sum of its proper divisors (24294235288).

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

21212013032 is a wasteful number, since it uses less digits than its factorization.

21212013032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432801 (or 432797 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21212013032 its reverse (23031021212), we get a palindrome (44243034244).

The spelling of 21212013032 in words is "twenty-one billion, two hundred twelve million, thirteen thousand, thirty-two".