220121201120121 has 20 divisors (see below), whose sum is σ = 375797747239552. Its totient is φ = 125783543496888.

The previous prime is 220121201120111. The next prime is 220121201120137. The reversal of 220121201120121 is 121021102121022.

220121201120121 is a `hidden beast` number, since 2 + 201 + 21 + 201 + 120 + 121 = 666.

It is not a de Polignac number, because 220121201120121 - 2⁹ = 220121201119609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121201120094 and 220121201120103.

It is not an unprimeable number, because it can be changed into a prime (220121201120111) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 194110406065 + ... + 194110407198.

Almost surely, 2^{220121201120121} is an apocalyptic number.

220121201120121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220121201120121 is a deficient number, since it is larger than the sum of its proper divisors (155676546119431).

220121201120121 is an equidigital number, since it uses as much as digits as its factorization.

220121201120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388220813282 (or 388220813273 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220121201120121 its reverse (121021102121022), we get a palindrome (341142303241143).

The spelling of 220121201120121 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty thousand, one hundred twenty-one".