122312156893 has 4 divisors (see below), whose sum is σ = 122356204380. Its totient is φ = 122268109408.

The previous prime is 122312156867. The next prime is 122312156909. The reversal of 122312156893 is 398651213221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398651213221 = 43 ⋅9270958447.

It can be written as a sum of positive squares in 2 ways, for example, as 49008218884 + 73303938009 = 221378^2 + 270747^2 .

It is a cyclic number.

It is not a de Polignac number, because 122312156893 - 2⁵ = 122312156861 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 (122312150893) 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, 22019578 + ... + 22025131.

It is an arithmetic number, because the mean of its divisors is an integer number (30589051095).

Almost surely, 2^122312156893 is an apocalyptic number.

It is an amenable number.

122312156893 is a deficient number, since it is larger than the sum of its proper divisors (44047487).

122312156893 is an equidigital number, since it uses as much as digits as its factorization.

122312156893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44047486.

The product of its digits is 155520, while the sum is 43.

The spelling of 122312156893 in words is "one hundred twenty-two billion, three hundred twelve million, one hundred fifty-six thousand, eight hundred ninety-three".