220201011022121 has 4 divisors (see below), whose sum is σ = 220206538057044. Its totient is φ = 220195483987200.

The previous prime is 220201011022117. The next prime is 220201011022151. The reversal of 220201011022121 is 121220110102022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147211242028096 + 72989768994025 = 12133064^2 + 8543405^2 .

It is a cyclic number.

It is not a de Polignac number, because 220201011022121 - 2² = 220201011022117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220201011022121.

It is not an unprimeable number, because it can be changed into a prime (220201011022151) 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, 2763457700 + ... + 2763537381.

It is an arithmetic number, because the mean of its divisors is an integer number (55051634514261).

Almost surely, 2^{220201011022121} is an apocalyptic number.

It is an amenable number.

220201011022121 is a deficient number, since it is larger than the sum of its proper divisors (5527034923).

220201011022121 is an equidigital number, since it uses as much as digits as its factorization.

220201011022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527034922.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220201011022121 its reverse (121220110102022), we get a palindrome (341421121124143).

The spelling of 220201011022121 in words is "two hundred twenty trillion, two hundred one billion, eleven million, twenty-two thousand, one hundred twenty-one".