21122100112 has 20 divisors (see below), whose sum is σ = 40928380416. Its totient is φ = 10559937440.

The previous prime is 21122100067. The next prime is 21122100137. The reversal of 21122100112 is 21100122112.

It is a super-2 number, since 2×21122100112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122100092 and 21122100101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99537 + ... + 228367.

Almost surely, 2^21122100112 is an apocalyptic number.

It is an amenable number.

21122100112 is a deficient number, since it is larger than the sum of its proper divisors (19806280304).

21122100112 is a wasteful number, since it uses less digits than its factorization.

21122100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139086 (or 139080 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21122100112 its reverse (21100122112), we get a palindrome (42222222224).

The spelling of 21122100112 in words is "twenty-one billion, one hundred twenty-two million, one hundred thousand, one hundred twelve".