421125012157 has 2 divisors, whose sum is σ = 421125012158. Its totient is φ = 421125012156.

The previous prime is 421125012067. The next prime is 421125012167. The reversal of 421125012157 is 751210521124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293180014521 + 127944997636 = 541461^2 + 357694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421125012157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421125012167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210562506078 + 210562506079.

It is an arithmetic number, because the mean of its divisors is an integer number (210562506079).

Almost surely, 2^421125012157 is an apocalyptic number.

It is an amenable number.

421125012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

421125012157 is an equidigital number, since it uses as much as digits as its factorization.

421125012157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The spelling of 421125012157 in words is "four hundred twenty-one billion, one hundred twenty-five million, twelve thousand, one hundred fifty-seven".