812551273123 has 2 divisors, whose sum is σ = 812551273124. Its totient is φ = 812551273122.

The previous prime is 812551273117. The next prime is 812551273133. The reversal of 812551273123 is 321372155218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812551273123 - 2⁵ = 812551273091 is a prime.

It is not a weakly prime, because it can be changed into another prime (812551273133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406275636561 + 406275636562.

It is an arithmetic number, because the mean of its divisors is an integer number (406275636562).

Almost surely, 2^812551273123 is an apocalyptic number.

812551273123 is a deficient number, since it is larger than the sum of its proper divisors (1).

812551273123 is an equidigital number, since it uses as much as digits as its factorization.

812551273123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The spelling of 812551273123 in words is "eight hundred twelve billion, five hundred fifty-one million, two hundred seventy-three thousand, one hundred twenty-three".