21021000022110 has 96 divisors (see below), whose sum is σ = 55481505408000. Its totient is φ = 5093448972480.

The previous prime is 21021000022073. The next prime is 21021000022159. The reversal of 21021000022110 is 1122000012012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5807919 + ... + 8704821.

It is an arithmetic number, because the mean of its divisors is an integer number (577932348000).

Almost surely, 2^{21021000022110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021000022110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27740752704000).

21021000022110 is an abundant number, since it is smaller than the sum of its proper divisors (34460505385890).

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

21021000022110 is a wasteful number, since it uses less digits than its factorization.

21021000022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898934 (or 2898923 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21021000022110 its reverse (1122000012012), we get a palindrome (22143000034122).

The spelling of 21021000022110 in words is "twenty-one trillion, twenty-one billion, twenty-two thousand, one hundred ten".