129081093121 has 4 divisors (see below), whose sum is σ = 129471066544. Its totient is φ = 128691119700.

The previous prime is 129081093101. The next prime is 129081093131. The reversal of 129081093121 is 121390180921.

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: 121390180921 = 296083 ⋅409987.

It is a cyclic number.

It is not a de Polignac number, because 129081093121 - 2¹³ = 129081084929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129081093101) 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, 194986215 + ... + 194986876.

It is an arithmetic number, because the mean of its divisors is an integer number (32367766636).

Almost surely, 2^129081093121 is an apocalyptic number.

It is an amenable number.

129081093121 is a deficient number, since it is larger than the sum of its proper divisors (389973423).

129081093121 is an equidigital number, since it uses as much as digits as its factorization.

129081093121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389973422.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 129081093121 in words is "one hundred twenty-nine billion, eighty-one million, ninety-three thousand, one hundred twenty-one".