220112212121 has 8 divisors (see below), whose sum is σ = 221242692000. Its totient is φ = 218983527360.

The previous prime is 220112212097. The next prime is 220112212127. The reversal of 220112212121 is 121212211022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220112212121 - 2¹⁰ = 220112211097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220112212121.

It is not an unprimeable number, because it can be changed into a prime (220112212127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202571 + ... + 693728.

It is an arithmetic number, because the mean of its divisors is an integer number (27655336500).

Almost surely, 2^220112212121 is an apocalyptic number.

It is an amenable number.

220112212121 is a deficient number, since it is larger than the sum of its proper divisors (1130479879).

220112212121 is a wasteful number, since it uses less digits than its factorization.

220112212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897559.

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

Adding to 220112212121 its reverse (121212211022), we get a palindrome (341324423143).

The spelling of 220112212121 in words is "two hundred twenty billion, one hundred twelve million, two hundred twelve thousand, one hundred twenty-one".