21122112110 has 48 divisors (see below), whose sum is σ = 41825554848. Its totient is φ = 7674300480.

The previous prime is 21122112103. The next prime is 21122112131. The reversal of 21122112110 is 1121122112.

It is a super-2 number, since 2×21122112110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1569932 + ... + 1583328.

It is an arithmetic number, because the mean of its divisors is an integer number (871365726).

Almost surely, 2^21122112110 is an apocalyptic number.

21122112110 is a deficient number, since it is larger than the sum of its proper divisors (20703442738).

21122112110 is a wasteful number, since it uses less digits than its factorization.

21122112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14729 (or 14718 counting only the distinct ones).

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

Adding to 21122112110 its reverse (1121122112), we get a palindrome (22243234222).

The spelling of 21122112110 in words is "twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred ten".