202221222220121 has 12 divisors (see below), whose sum is σ = 218976117700032. Its totient is φ = 186663321267696.

The previous prime is 202221222220091. The next prime is 202221222220187. The reversal of 202221222220121 is 121022222122202.

It is a de Polignac number, because none of the positive numbers 2^k-202221222220121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202221222220921) 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, 5363420 + ... + 20813666.

It is an arithmetic number, because the mean of its divisors is an integer number (18248009808336).

Almost surely, 2^{202221222220121} is an apocalyptic number.

It is an amenable number.

202221222220121 is a deficient number, since it is larger than the sum of its proper divisors (16754895479911).

202221222220121 is a wasteful number, since it uses less digits than its factorization.

202221222220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15527720 (or 15527707 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 202221222220121 its reverse (121022222122202), we get a palindrome (323243444342323).

The spelling of 202221222220121 in words is "two hundred two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".