79121011129 has 2 divisors, whose sum is σ = 79121011130. Its totient is φ = 79121011128.

The previous prime is 79121011097. The next prime is 79121011139. The reversal of 79121011129 is 92111012197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75812115600 + 3308895529 = 275340^2 + 57523^2 .

It is a cyclic number.

It is not a de Polignac number, because 79121011129 - 2⁵ = 79121011097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79121011094 and 79121011103.

It is not a weakly prime, because it can be changed into another prime (79121011139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39560505564 + 39560505565.

It is an arithmetic number, because the mean of its divisors is an integer number (39560505565).

Almost surely, 2^79121011129 is an apocalyptic number.

It is an amenable number.

79121011129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79121011129 is an equidigital number, since it uses as much as digits as its factorization.

79121011129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 79121011129 in words is "seventy-nine billion, one hundred twenty-one million, eleven thousand, one hundred twenty-nine".