21112122122093 has 4 divisors (see below), whose sum is σ = 21120989038428. Its totient is φ = 21103255205760.

The previous prime is 21112122122051. The next prime is 21112122122131. The reversal of 21112122122093 is 39022122121112.

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 5176161913924 + 15935960208169 = 2275118^2 + 3991987^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112122122093 - 2⁴² = 16714075610989 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 (21112122122023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4433454596 + ... + 4433459357.

It is an arithmetic number, because the mean of its divisors is an integer number (5280247259607).

Almost surely, 2^{21112122122093} is an apocalyptic number.

It is an amenable number.

21112122122093 is a deficient number, since it is larger than the sum of its proper divisors (8866916335).

21112122122093 is an equidigital number, since it uses as much as digits as its factorization.

21112122122093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8866916334.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 21112122122093 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, ninety-three".