213123312079 has 2 divisors, whose sum is σ = 213123312080. Its totient is φ = 213123312078.

The previous prime is 213123312071. The next prime is 213123312091. The reversal of 213123312079 is 970213321312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213123312079 - 2³ = 213123312071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213123312071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561656039 + 106561656040.

It is an arithmetic number, because the mean of its divisors is an integer number (106561656040).

Almost surely, 2^213123312079 is an apocalyptic number.

213123312079 is a deficient number, since it is larger than the sum of its proper divisors (1).

213123312079 is an equidigital number, since it uses as much as digits as its factorization.

213123312079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 213123312079 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred twelve thousand, seventy-nine".