129919211 has 4 divisors (see below), whose sum is σ = 132940632. Its totient is φ = 126897792.

The previous prime is 129919183. The next prime is 129919243. The reversal of 129919211 is 112919921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112919921 = 137 ⋅824233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129919211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129919261) 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, 1510646 + ... + 1510731.

It is an arithmetic number, because the mean of its divisors is an integer number (33235158).

Almost surely, 2^129919211 is an apocalyptic number.

129919211 is a deficient number, since it is larger than the sum of its proper divisors (3021421).

129919211 is an equidigital number, since it uses as much as digits as its factorization.

129919211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021420.

The product of its digits is 2916, while the sum is 35.

The square root of 129919211 is about 11398.2108683775. The cubic root of 129919211 is about 506.4747415297.

The spelling of 129919211 in words is "one hundred twenty-nine million, nine hundred nineteen thousand, two hundred eleven".