129186401401 has 4 divisors (see below), whose sum is σ = 133353704704. Its totient is φ = 125019098100.

The previous prime is 129186401303. The next prime is 129186401417. The reversal of 129186401401 is 104104681921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104104681921 = 193 ⋅539402497.

It is a cyclic number.

It is not a de Polignac number, because 129186401401 - 2¹³ = 129186393209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129186404401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083651605 + ... + 2083651666.

It is an arithmetic number, because the mean of its divisors is an integer number (33338426176).

Almost surely, 2^129186401401 is an apocalyptic number.

It is an amenable number.

129186401401 is a deficient number, since it is larger than the sum of its proper divisors (4167303303).

129186401401 is an equidigital number, since it uses as much as digits as its factorization.

129186401401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167303302.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 129186401401 in words is "one hundred twenty-nine billion, one hundred eighty-six million, four hundred one thousand, four hundred one".