21010122021110 has 32 divisors (see below), whose sum is σ = 38197897732512. Its totient is φ = 8319698732800.

The previous prime is 21010122021103. The next prime is 21010122021113. The reversal of 21010122021110 is 1112022101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010122021113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5956634 + ... + 8803506.

It is an arithmetic number, because the mean of its divisors is an integer number (1193684304141).

Almost surely, 2^{21010122021110} is an apocalyptic number.

21010122021110 is a deficient number, since it is larger than the sum of its proper divisors (17187775711402).

21010122021110 is a wasteful number, since it uses less digits than its factorization.

21010122021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854288.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21010122021110 its reverse (1112022101012), we get a palindrome (22122144122122).

The spelling of 21010122021110 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, twenty-one thousand, one hundred ten".