21021011002110 has 64 divisors (see below), whose sum is σ = 58252038792192. Its totient is φ = 4755268463616.

The previous prime is 21021011002091. The next prime is 21021011002213. The reversal of 21021011002110 is 1120011012012.

It is a congruent number.

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, 515959282 + ... + 516000021.

It is an arithmetic number, because the mean of its divisors is an integer number (910188106128).

Almost surely, 2^{21021011002110} is an apocalyptic number.

21021011002110 is an abundant number, since it is smaller than the sum of its proper divisors (37231027790082).

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

21021011002110 is a wasteful number, since it uses less digits than its factorization.

21021011002110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031959417.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21021011002110 its reverse (1120011012012), we get a palindrome (22141022014122).

The spelling of 21021011002110 in words is "twenty-one trillion, twenty-one billion, eleven million, two thousand, one hundred ten".