202220210112121 has 4 divisors (see below), whose sum is σ = 202583262554532. Its totient is φ = 201857157669712.

The previous prime is 202220210112113. The next prime is 202220210112133. The reversal of 202220210112121 is 121211012022202.

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 123011634105721 + 79208576006400 = 11091061^2 + 8899920^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220210112121 - 2³ = 202220210112113 is a prime.

It is a super-4 number, since 4×202220210112121⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202220210112521) 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, 181526220370 + ... + 181526221483.

It is an arithmetic number, because the mean of its divisors is an integer number (50645815638633).

Almost surely, 2^{202220210112121} is an apocalyptic number.

It is an amenable number.

202220210112121 is a deficient number, since it is larger than the sum of its proper divisors (363052442411).

202220210112121 is an equidigital number, since it uses as much as digits as its factorization.

202220210112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363052442410.

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

Adding to 202220210112121 its reverse (121211012022202), we get a palindrome (323431222134323).

The spelling of 202220210112121 in words is "two hundred two trillion, two hundred twenty billion, two hundred ten million, one hundred twelve thousand, one hundred twenty-one".