21000022010 has 64 divisors (see below), whose sum is σ = 43081372800. Its totient is φ = 7299936000.

The previous prime is 21000022007. The next prime is 21000022063. The reversal of 21000022010 is 1022000012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289601 + ... + 354779.

It is an arithmetic number, because the mean of its divisors is an integer number (673146450).

Almost surely, 2^21000022010 is an apocalyptic number.

21000022010 is an abundant number, since it is smaller than the sum of its proper divisors (22081350790).

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

21000022010 is a wasteful number, since it uses less digits than its factorization.

21000022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65327.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21000022010 its reverse (1022000012), we get a palindrome (22022022022).

It can be divided in two parts, 2100002 and 2010, that added together give a palindrome (2102012).

The spelling of 21000022010 in words is "twenty-one billion, twenty-two thousand, ten".