202202112202021 has 4 divisors (see below), whose sum is σ = 206504284802112. Its totient is φ = 197899939601932.

The previous prime is 202202112202001. The next prime is 202202112202037. The reversal of 202202112202021 is 120202211202202.

202202112202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202202112202021 - 2¹¹ = 202202112199973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202202112202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202202112202001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151086299975 + ... + 2151086300068.

It is an arithmetic number, because the mean of its divisors is an integer number (51626071200528).

Almost surely, 2^{202202112202021} is an apocalyptic number.

It is an amenable number.

202202112202021 is a deficient number, since it is larger than the sum of its proper divisors (4302172600091).

202202112202021 is an equidigital number, since it uses as much as digits as its factorization.

202202112202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302172600090.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202202112202021 its reverse (120202211202202), we get a palindrome (322404323404223).

The spelling of 202202112202021 in words is "two hundred two trillion, two hundred two billion, one hundred twelve million, two hundred two thousand, twenty-one".