21112012122110 has 128 divisors (see below), whose sum is σ = 47436897521664. Its totient is φ = 6586535531520.

The previous prime is 21112012122109. The next prime is 21112012122137. The reversal of 21112012122110 is 1122121021112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 536049479 + ... + 536088861.

It is an arithmetic number, because the mean of its divisors is an integer number (370600761888).

Almost surely, 2^{21112012122110} is an apocalyptic number.

21112012122110 is an abundant number, since it is smaller than the sum of its proper divisors (26324885399554).

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

21112012122110 is a wasteful number, since it uses less digits than its factorization.

21112012122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47778.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112012122110 its reverse (1122121021112), we get a palindrome (22234133143222).

The spelling of 21112012122110 in words is "twenty-one trillion, one hundred twelve billion, twelve million, one hundred twenty-two thousand, one hundred ten".