202231201220121 has 4 divisors (see below), whose sum is σ = 269641601626832. Its totient is φ = 134820800813412.

The previous prime is 202231201220101. The next prime is 202231201220137. The reversal of 202231201220121 is 121022102132202.

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 not a de Polignac number, because 202231201220121 - 2¹⁴ = 202231201203737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202231201220101) 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, 33705200203351 + ... + 33705200203356.

It is an arithmetic number, because the mean of its divisors is an integer number (67410400406708).

Almost surely, 2^{202231201220121} is an apocalyptic number.

It is an amenable number.

202231201220121 is a deficient number, since it is larger than the sum of its proper divisors (67410400406711).

202231201220121 is an equidigital number, since it uses as much as digits as its factorization.

202231201220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67410400406710.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 202231201220121 its reverse (121022102132202), we get a palindrome (323253303352323).

The spelling of 202231201220121 in words is "two hundred two trillion, two hundred thirty-one billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".