220121101220101 has 4 divisors (see below), whose sum is σ = 222907444273600. Its totient is φ = 217334758166604.

The previous prime is 220121101220021. The next prime is 220121101220123. The reversal of 220121101220101 is 101022101121022.

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.

It is a cyclic number.

It is not a de Polignac number, because 220121101220101 - 2⁹ = 220121101219589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121101220171) 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, 1393171526631 + ... + 1393171526788.

It is an arithmetic number, because the mean of its divisors is an integer number (55726861068400).

Almost surely, 2^{220121101220101} is an apocalyptic number.

It is an amenable number.

220121101220101 is a deficient number, since it is larger than the sum of its proper divisors (2786343053499).

220121101220101 is an equidigital number, since it uses as much as digits as its factorization.

220121101220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786343053498.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220121101220101 its reverse (101022101121022), we get a palindrome (321143202341123).

The spelling of 220121101220101 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred one".