202201111212221 has 16 divisors (see below), whose sum is σ = 223204677667200. Its totient is φ = 181641637224000.

The previous prime is 202201111212173. The next prime is 202201111212239. The reversal of 202201111212221 is 122212111102202.

It is a cyclic number.

It is not a de Polignac number, because 202201111212221 - 2⁶ = 202201111212157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202201111212193 and 202201111212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202201111212281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178215641 + ... + 179346638.

It is an arithmetic number, because the mean of its divisors is an integer number (13950292354200).

Almost surely, 2^{202201111212221} is an apocalyptic number.

It is an amenable number.

202201111212221 is a deficient number, since it is larger than the sum of its proper divisors (21003566454979).

202201111212221 is a wasteful number, since it uses less digits than its factorization.

202201111212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357562900.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 202201111212221 its reverse (122212111102202), we get a palindrome (324413222314423).

The spelling of 202201111212221 in words is "two hundred two trillion, two hundred one billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".