220220322121 has 4 divisors (see below), whose sum is σ = 220221271552. Its totient is φ = 220219372692.

The previous prime is 220220322107. The next prime is 220220322139. The reversal of 220220322121 is 121223022022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 220220322121 - 2²⁷ = 220086104393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220220322181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129880 + ... + 676246.

It is an arithmetic number, because the mean of its divisors is an integer number (55055317888).

Almost surely, 2^220220322121 is an apocalyptic number.

It is an amenable number.

220220322121 is a deficient number, since it is larger than the sum of its proper divisors (949431).

220220322121 is an equidigital number, since it uses as much as digits as its factorization.

220220322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949430.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 220220322121 its reverse (121223022022), we get a palindrome (341443344143).

The spelling of 220220322121 in words is "two hundred twenty billion, two hundred twenty million, three hundred twenty-two thousand, one hundred twenty-one".