2101122112212 has 72 divisors (see below), whose sum is σ = 5671549578240. Its totient is φ = 654409546560.

The previous prime is 2101122112211. The next prime is 2101122112249. The reversal of 2101122112212 is 2122112211012.

2101122112212 is a `hidden beast` number, since 210 + 11 + 221 + 1 + 221 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101122112211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32428428 + ... + 32493155.

It is an arithmetic number, because the mean of its divisors is an integer number (78771521920).

Almost surely, 2^{2101122112212} is an apocalyptic number.

It is an amenable number.

2101122112212 is an abundant number, since it is smaller than the sum of its proper divisors (3570427466028).

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

2101122112212 is a wasteful number, since it uses less digits than its factorization.

2101122112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64921653 (or 64921648 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2101122112212 its reverse (2122112211012), we get a palindrome (4223234323224).

The spelling of 2101122112212 in words is "two trillion, one hundred one billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twelve".