102112133101021 has 4 divisors (see below), whose sum is σ = 102171466126044. Its totient is φ = 102052800076000.

The previous prime is 102112133101019. The next prime is 102112133101129. The reversal of 102112133101021 is 120101331211201.

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 42554564904996 + 59557568196025 = 6523386^2 + 7717355^2 .

It is a cyclic number.

It is not a de Polignac number, because 102112133101021 - 2¹ = 102112133101019 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 102112133101021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112133104021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29666509930 + ... + 29666513371.

It is an arithmetic number, because the mean of its divisors is an integer number (25542866531511).

Almost surely, 2^{102112133101021} is an apocalyptic number.

It is an amenable number.

102112133101021 is a deficient number, since it is larger than the sum of its proper divisors (59333025023).

102112133101021 is an equidigital number, since it uses as much as digits as its factorization.

102112133101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59333025022.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 102112133101021 its reverse (120101331211201), we get a palindrome (222213464312222).

The spelling of 102112133101021 in words is "one hundred two trillion, one hundred twelve billion, one hundred thirty-three million, one hundred one thousand, twenty-one".