21022120110 has 64 divisors (see below), whose sum is σ = 50817259584. Its totient is φ = 5565542400.

The previous prime is 21022120043. The next prime is 21022120121. The reversal of 21022120110 is 1102122012.

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, 3586302 + ... + 3592158.

It is an arithmetic number, because the mean of its divisors is an integer number (794019681).

Almost surely, 2^21022120110 is an apocalyptic number.

21022120110 is an abundant number, since it is smaller than the sum of its proper divisors (29795139474).

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

21022120110 is a wasteful number, since it uses less digits than its factorization.

21022120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709.

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

Adding to 21022120110 its reverse (1102122012), we get a palindrome (22124242122).

It can be divided in two parts, 2102 and 2120110, that added together give a palindrome (2122212).

The spelling of 21022120110 in words is "twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred ten".