202221001111221 has 8 divisors (see below), whose sum is σ = 299586668312960. Its totient is φ = 134814000740796.

The previous prime is 202221001111193. The next prime is 202221001111247. The reversal of 202221001111221 is 122111100122202.

202221001111221 is a `hidden beast` number, since 202 + 221 + 0 + 0 + 11 + 11 + 221 = 666.

It is not a de Polignac number, because 202221001111221 - 2¹⁷ = 202221000980149 is a prime.

It is a super-2 number, since 2×202221001111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202221001111194 and 202221001111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221001111021) 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, 3744833353885 + ... + 3744833353938.

It is an arithmetic number, because the mean of its divisors is an integer number (37448333539120).

Almost surely, 2^{202221001111221} is an apocalyptic number.

It is an amenable number.

202221001111221 is a deficient number, since it is larger than the sum of its proper divisors (97365667201739).

202221001111221 is an equidigital number, since it uses as much as digits as its factorization.

202221001111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7489666707832 (or 7489666707826 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 202221001111221 its reverse (122111100122202), we get a palindrome (324332101233423).

The spelling of 202221001111221 in words is "two hundred two trillion, two hundred twenty-one billion, one million, one hundred eleven thousand, two hundred twenty-one".