10202112122021 has 4 divisors (see below), whose sum is σ = 10236931617612. Its totient is φ = 10167292626432.

The previous prime is 10202112122011. The next prime is 10202112122087. The reversal of 10202112122021 is 12022121120201.

10202112122021 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5022910204225 + 5179201917796 = 2241185^2 + 2275786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202112122021 - 2²² = 10202107927717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202112122011) 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, 17409747356 + ... + 17409747941.

It is an arithmetic number, because the mean of its divisors is an integer number (2559232904403).

Almost surely, 2^{10202112122021} is an apocalyptic number.

It is an amenable number.

10202112122021 is a deficient number, since it is larger than the sum of its proper divisors (34819495591).

10202112122021 is an equidigital number, since it uses as much as digits as its factorization.

10202112122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34819495590.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10202112122021 its reverse (12022121120201), we get a palindrome (22224233242222).

The spelling of 10202112122021 in words is "ten trillion, two hundred two billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".