2021121122112 has 112 divisors (see below), whose sum is σ = 6133390425600. Its totient is φ = 651974538240.

The previous prime is 2021121122101. The next prime is 2021121122117. The reversal of 2021121122112 is 2112211211202.

2021121122112 is a `hidden beast` number, since 20 + 211 + 211 + 221 + 1 + 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 (2021121122117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18811437 + ... + 18918572.

Almost surely, 2^{2021121122112} is an apocalyptic number.

It is an amenable number.

2021121122112 is an abundant number, since it is smaller than the sum of its proper divisors (4112269303488).

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

2021121122112 is a wasteful number, since it uses less digits than its factorization.

2021121122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37730061 (or 37730045 counting only the distinct ones).

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

Adding to 2021121122112 its reverse (2112211211202), we get a palindrome (4133332333314).

The spelling of 2021121122112 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twelve".