21111312122110 has 16 divisors (see below), whose sum is σ = 43428984937056. Its totient is φ = 7238164156128.

The previous prime is 21111312122107. The next prime is 21111312122123. The reversal of 21111312122110 is 1122121311112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150795086517 + ... + 150795086656.

It is an arithmetic number, because the mean of its divisors is an integer number (2714311558566).

Almost surely, 2^{21111312122110} is an apocalyptic number.

21111312122110 is an abundant number, since it is smaller than the sum of its proper divisors (22317672814946).

21111312122110 is a wasteful number, since it uses less digits than its factorization.

21111312122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301590173187.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 21111312122110 its reverse (1122121311112), we get a palindrome (22233433433222).

The spelling of 21111312122110 in words is "twenty-one trillion, one hundred eleven billion, three hundred twelve million, one hundred twenty-two thousand, one hundred ten".