220120211121 has 16 divisors (see below), whose sum is σ = 311108356224. Its totient is φ = 137958904064.

The previous prime is 220120211093. The next prime is 220120211137. The reversal of 220120211121 is 121112021022.

It is a cyclic number.

It is not a de Polignac number, because 220120211121 - 2¹⁹ = 220119686833 is a prime.

It is a super-2 number, since 2×220120211121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220120211121.

It is not an unprimeable number, because it can be changed into a prime (220120211141) 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, 2387730 + ... + 2478203.

It is an arithmetic number, because the mean of its divisors is an integer number (19444272264).

Almost surely, 2^220120211121 is an apocalyptic number.

It is an amenable number.

220120211121 is a deficient number, since it is larger than the sum of its proper divisors (90988145103).

220120211121 is a wasteful number, since it uses less digits than its factorization.

220120211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866840.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220120211121 its reverse (121112021022), we get a palindrome (341232232143).

The spelling of 220120211121 in words is "two hundred twenty billion, one hundred twenty million, two hundred eleven thousand, one hundred twenty-one".