202221111212021 has 16 divisors (see below), whose sum is σ = 225292302936000. Its totient is φ = 179972064624000.

The previous prime is 202221111212017. The next prime is 202221111212027. The reversal of 202221111212021 is 120212111122202.

It is not a de Polignac number, because 202221111212021 - 2² = 202221111212017 is a prime.

It is a super-2 number, since 2×202221111212021² (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 = 202221111211984 and 202221111212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221111212027) 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, 1022469671 + ... + 1022667428.

It is an arithmetic number, because the mean of its divisors is an integer number (14080768933500).

Almost surely, 2^{202221111212021} is an apocalyptic number.

It is an amenable number.

202221111212021 is a deficient number, since it is larger than the sum of its proper divisors (23071191723979).

202221111212021 is a wasteful number, since it uses less digits than its factorization.

202221111212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045137300.

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

Adding to 202221111212021 its reverse (120212111122202), we get a palindrome (322433222334223).

The spelling of 202221111212021 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, twenty-one".