220121022200121 has 12 divisors (see below), whose sum is σ = 363374385854272. Its totient is φ = 125783441257176.

The previous prime is 220121022200083. The next prime is 220121022200137. The reversal of 220121022200121 is 121002220121022.

It is a happy number.

220121022200121 is a `hidden beast` number, since 220 + 1 + 2 + 102 + 220 + 0 + 121 = 666.

It is not a de Polignac number, because 220121022200121 - 2¹⁰ = 220121022199097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121022200094 and 220121022200103.

It is not an unprimeable number, because it can be changed into a prime (220121022201121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1746992239621 + ... + 1746992239746.

Almost surely, 2^{220121022200121} is an apocalyptic number.

220121022200121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220121022200121 is a deficient number, since it is larger than the sum of its proper divisors (143253363654151).

220121022200121 is a wasteful number, since it uses less digits than its factorization.

220121022200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493984479380 (or 3493984479377 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220121022200121 its reverse (121002220121022), we get a palindrome (341123242321143).

The spelling of 220121022200121 in words is "two hundred twenty trillion, one hundred twenty-one billion, twenty-two million, two hundred thousand, one hundred twenty-one".