21021200110110 has 32 divisors (see below), whose sum is σ = 51305979934080. Its totient is φ = 5510642288288.

The previous prime is 21021200110073. The next prime is 21021200110123. The reversal of 21021200110110 is 1101100212012.

It is a super-2 number, since 2×21021200110110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5938190352 + ... + 5938193891.

It is an arithmetic number, because the mean of its divisors is an integer number (1603311872940).

Almost surely, 2^{21021200110110} is an apocalyptic number.

21021200110110 is an abundant number, since it is smaller than the sum of its proper divisors (30284779823970).

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

21021200110110 is a wasteful number, since it uses less digits than its factorization.

21021200110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11876384312.

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

Adding to 21021200110110 its reverse (1101100212012), we get a palindrome (22122300322122).

The spelling of 21021200110110 in words is "twenty-one trillion, twenty-one billion, two hundred million, one hundred ten thousand, one hundred ten".