2112220120121 has 16 divisors (see below), whose sum is σ = 2152026422400. Its totient is φ = 2073145195440.

The previous prime is 2112220120099. The next prime is 2112220120123. The reversal of 2112220120121 is 1210210222112.

It is not a de Polignac number, because 2112220120121 - 2³⁴ = 2095040250937 is a prime.

It is a super-2 number, since 2×2112220120121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112220120121.

It is not an unprimeable number, because it can be changed into a prime (2112220120123) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 135747740 + ... + 135763298.

It is an arithmetic number, because the mean of its divisors is an integer number (134501651400).

Almost surely, 2^{2112220120121} is an apocalyptic number.

It is an amenable number.

2112220120121 is a deficient number, since it is larger than the sum of its proper divisors (39806302279).

2112220120121 is an frugal number, since it uses more digits than its factorization.

2112220120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16397 (or 16279 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2112220120121 its reverse (1210210222112), we get a palindrome (3322430342233).

The spelling of 2112220120121 in words is "two trillion, one hundred twelve billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".