202221222211021 has 32 divisors (see below), whose sum is σ = 233162339423328. Its totient is φ = 173727680102400.

The previous prime is 202221222211009. The next prime is 202221222211031. The reversal of 202221222211021 is 120112222122202.

It can be written as a sum of positive squares in 16 ways, for example, as 48472382008521 + 153748840202500 = 6962211^2 + 12399550^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221222211021 - 2²⁹ = 202220685340109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202221222210983 and 202221222211001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221222211031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12106221 + ... + 23473453.

It is an arithmetic number, because the mean of its divisors is an integer number (7286323106979).

Almost surely, 2^{202221222211021} is an apocalyptic number.

It is an amenable number.

202221222211021 is a deficient number, since it is larger than the sum of its proper divisors (30941117212307).

202221222211021 is a wasteful number, since it uses less digits than its factorization.

202221222211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11368161.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 202221222211021 its reverse (120112222122202), we get a palindrome (322333444333223).

The spelling of 202221222211021 in words is "two hundred two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, twenty-one".