129211293 has 4 divisors (see below), whose sum is σ = 172281728. Its totient is φ = 86140860.

The previous prime is 129211283. The next prime is 129211301. The reversal of 129211293 is 392112921.

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.

It is not a de Polignac number, because 129211293 - 2⁵ = 129211261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129211293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129211223) 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, 21535213 + ... + 21535218.

It is an arithmetic number, because the mean of its divisors is an integer number (43070432).

Almost surely, 2^129211293 is an apocalyptic number.

It is an amenable number.

129211293 is a deficient number, since it is larger than the sum of its proper divisors (43070435).

129211293 is an equidigital number, since it uses as much as digits as its factorization.

129211293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43070434.

The product of its digits is 1944, while the sum is 30.

The square root of 129211293 is about 11367.1145415184. The cubic root of 129211293 is about 505.5531539680.

The spelling of 129211293 in words is "one hundred twenty-nine million, two hundred eleven thousand, two hundred ninety-three".