202201212212121 has 8 divisors (see below), whose sum is σ = 269601709073344. Its totient is φ = 134800761746160.

The previous prime is 202201212212107. The next prime is 202201212212177. The reversal of 202201212212121 is 121212212102202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202201212212121 - 2⁵ = 202201212212089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202201212214121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320076 + ... + 20112306.

It is an arithmetic number, because the mean of its divisors is an integer number (33700213634168).

Almost surely, 2^{202201212212121} is an apocalyptic number.

It is an amenable number.

202201212212121 is a deficient number, since it is larger than the sum of its proper divisors (67400496861223).

202201212212121 is a wasteful number, since it uses less digits than its factorization.

202201212212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23197631.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 202201212212121 its reverse (121212212102202), we get a palindrome (323413424314323).

The spelling of 202201212212121 in words is "two hundred two trillion, two hundred one billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-one".