129942691241 has 4 divisors (see below), whose sum is σ = 141755663184. Its totient is φ = 118129719300.

The previous prime is 129942691237. The next prime is 129942691283. The reversal of 129942691241 is 142196249921.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 129942691241 - 2² = 129942691237 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 129942691241.

It is not an unprimeable number, because it can be changed into a prime (129942691211) 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, 5906485955 + ... + 5906485976.

It is an arithmetic number, because the mean of its divisors is an integer number (35438915796).

Almost surely, 2^129942691241 is an apocalyptic number.

129942691241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129942691241 is a deficient number, since it is larger than the sum of its proper divisors (11812971943).

129942691241 is a wasteful number, since it uses less digits than its factorization.

129942691241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812971942.

The product of its digits is 559872, while the sum is 50.

The spelling of 129942691241 in words is "one hundred twenty-nine billion, nine hundred forty-two million, six hundred ninety-one thousand, two hundred forty-one".