202002210001221 has 32 divisors (see below), whose sum is σ = 309650898781440. Its totient is φ = 114740834732544.

The previous prime is 202002210001217. The next prime is 202002210001231. The reversal of 202002210001221 is 122100012200202.

It is not a de Polignac number, because 202002210001221 - 2² = 202002210001217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202002210001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202002210001231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13884475 + ... + 24429143.

It is an arithmetic number, because the mean of its divisors is an integer number (9676590586920).

Almost surely, 2^{202002210001221} is an apocalyptic number.

202002210001221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202002210001221 is a deficient number, since it is larger than the sum of its proper divisors (107648688780219).

202002210001221 is a wasteful number, since it uses less digits than its factorization.

202002210001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550125.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202002210001221 its reverse (122100012200202), we get a palindrome (324102222201423).

The spelling of 202002210001221 in words is "two hundred two trillion, two billion, two hundred ten million, one thousand, two hundred twenty-one".