202100211001221 has 64 divisors (see below), whose sum is σ = 293187819165696. Its totient is φ = 123089088326400.

The previous prime is 202100211001207. The next prime is 202100211001279. The reversal of 202100211001221 is 122100112001202.

It is not a de Polignac number, because 202100211001221 - 2¹¹ = 202100210999173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202100211001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202100211001021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33180133386 + ... + 33180139476.

It is an arithmetic number, because the mean of its divisors is an integer number (4581059674464).

Almost surely, 2^{202100211001221} is an apocalyptic number.

It is an amenable number.

202100211001221 is a deficient number, since it is larger than the sum of its proper divisors (91087608164475).

202100211001221 is a wasteful number, since it uses less digits than its factorization.

202100211001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202100211001221 its reverse (122100112001202), we get a palindrome (324200323002423).

The spelling of 202100211001221 in words is "two hundred two trillion, one hundred billion, two hundred eleven million, one thousand, two hundred twenty-one".