129029812211 has 4 divisors (see below), whose sum is σ = 129033674352. Its totient is φ = 129025950072.

The previous prime is 129029812189. The next prime is 129029812237. The reversal of 129029812211 is 112218920921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129029812211 - 2²² = 129025617907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129029812811) 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, 1880516 + ... + 1947921.

It is an arithmetic number, because the mean of its divisors is an integer number (32258418588).

Almost surely, 2^129029812211 is an apocalyptic number.

129029812211 is a deficient number, since it is larger than the sum of its proper divisors (3862141).

129029812211 is an equidigital number, since it uses as much as digits as its factorization.

129029812211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862140.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 129029812211 in words is "one hundred twenty-nine billion, twenty-nine million, eight hundred twelve thousand, two hundred eleven".