202002222120121 has 12 divisors (see below), whose sum is σ = 214551401284452. Its totient is φ = 190151605616544.

The previous prime is 202002222120113. The next prime is 202002222120163. The reversal of 202002222120121 is 121021222200202.

It can be written as a sum of positive squares in 2 ways, for example, as 47076902510121 + 154925319610000 = 6861261^2 + 12446900^2 .

It is not a de Polignac number, because 202002222120121 - 2³ = 202002222120113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202002222120821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1781990910 + ... + 1782104263.

It is an arithmetic number, because the mean of its divisors is an integer number (17879283440371).

Almost surely, 2^{202002222120121} is an apocalyptic number.

It is an amenable number.

202002222120121 is a deficient number, since it is larger than the sum of its proper divisors (12549179164331).

202002222120121 is a wasteful number, since it uses less digits than its factorization.

202002222120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564095368 (or 3564095349 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202002222120121 its reverse (121021222200202), we get a palindrome (323023444320323).

The spelling of 202002222120121 in words is "two hundred two trillion, two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty-one".