129776172974101 has 2 divisors, whose sum is σ = 129776172974102. Its totient is φ = 129776172974100.

The previous prime is 129776172974093. The next prime is 129776172974213. The reversal of 129776172974101 is 101479271677921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118459845173476 + 11316327800625 = 10883926^2 + 3363975^2 .

It is a cyclic number.

It is not a de Polignac number, because 129776172974101 - 2³ = 129776172974093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129776172974401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64888086487050 + 64888086487051.

It is an arithmetic number, because the mean of its divisors is an integer number (64888086487051).

Almost surely, 2^{129776172974101} is an apocalyptic number.

It is an amenable number.

129776172974101 is a deficient number, since it is larger than the sum of its proper divisors (1).

129776172974101 is an equidigital number, since it uses as much as digits as its factorization.

129776172974101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18670176, while the sum is 64.

The spelling of 129776172974101 in words is "one hundred twenty-nine trillion, seven hundred seventy-six billion, one hundred seventy-two million, nine hundred seventy-four thousand, one hundred one".