21112120122112 has 36 divisors (see below), whose sum is σ = 42150940607776. Its totient is φ = 10553763179520.

The previous prime is 21112120122091. The next prime is 21112120122151. The reversal of 21112120122112 is 21122102121112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112120122112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7793064 + ... + 10146727.

Almost surely, 2^{21112120122112} is an apocalyptic number.

It is an amenable number.

21112120122112 is a deficient number, since it is larger than the sum of its proper divisors (21038820485664).

21112120122112 is an equidigital number, since it uses as much as digits as its factorization.

21112120122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17944404 (or 17944390 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21112120122112 its reverse (21122102121112), we get a palindrome (42234222243224).

The spelling of 21112120122112 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twelve".