220220121 has 24 divisors (see below), whose sum is σ = 324166752. Its totient is φ = 132880000.

The previous prime is 220220111. The next prime is 220220137. The reversal of 220220121 is 121022022.

It is not a de Polignac number, because 220220121 - 2⁹ = 220219609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220220097 and 220220106.

It is not an unprimeable number, because it can be changed into a prime (220220111) 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, 89905 + ... + 92321.

It is an arithmetic number, because the mean of its divisors is an integer number (13506948).

Almost surely, 2^220220121 is an apocalyptic number.

It is an amenable number.

220220121 is a deficient number, since it is larger than the sum of its proper divisors (103946631).

220220121 is a wasteful number, since it uses less digits than its factorization.

220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 220220121 is about 14839.8153964259. The cubic root of 220220121 is about 603.8823442670.

Adding to 220220121 its reverse (121022022), we get a palindrome (341242143).

The spelling of 220220121 in words is "two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".