21122110110 has 32 divisors (see below), whose sum is σ = 50725527552. Its totient is φ = 5628955680.

The previous prime is 21122110091. The next prime is 21122110111. The reversal of 21122110110 is 1101122112.

It is a super-2 number, since 2×21122110110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122110111) 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, 177646 + ... + 271665.

It is an arithmetic number, because the mean of its divisors is an integer number (1585172736).

Almost surely, 2^21122110110 is an apocalyptic number.

21122110110 is an abundant number, since it is smaller than the sum of its proper divisors (29603417442).

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

21122110110 is a wasteful number, since it uses less digits than its factorization.

21122110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450888.

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

Adding to 21122110110 its reverse (1101122112), we get a palindrome (22223232222).

The spelling of 21122110110 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand, one hundred ten".