220221010122121 has 4 divisors (see below), whose sum is σ = 220228609482000. Its totient is φ = 220213410762244.

The previous prime is 220221010122073. The next prime is 220221010122259. The reversal of 220221010122121 is 121221010122022.

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 220221010122121 - 2⁷ = 220221010121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220221010132121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3799636471 + ... + 3799694428.

It is an arithmetic number, because the mean of its divisors is an integer number (55057152370500).

Almost surely, 2^{220221010122121} is an apocalyptic number.

It is an amenable number.

220221010122121 is a deficient number, since it is larger than the sum of its proper divisors (7599359879).

220221010122121 is an equidigital number, since it uses as much as digits as its factorization.

220221010122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7599359878.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220221010122121 its reverse (121221010122022), we get a palindrome (341442020244143).

Subtracting from 220221010122121 its reverse (121221010122022), we obtain a palindrome (99000000000099).

The spelling of 220221010122121 in words is "two hundred twenty trillion, two hundred twenty-one billion, ten million, one hundred twenty-two thousand, one hundred twenty-one".