129212476997 has 16 divisors (see below), whose sum is σ = 139161602880. Its totient is φ = 119525160192.

The previous prime is 129212476993. The next prime is 129212477027. The reversal of 129212476997 is 799674212921.

It is not a de Polignac number, because 129212476997 - 2² = 129212476993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129212476993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6060518 + ... + 6081800.

It is an arithmetic number, because the mean of its divisors is an integer number (8697600180).

Almost surely, 2^129212476997 is an apocalyptic number.

129212476997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

129212476997 is a deficient number, since it is larger than the sum of its proper divisors (9949125883).

129212476997 is a wasteful number, since it uses less digits than its factorization.

129212476997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27412.

The product of its digits is 6858432, while the sum is 59.

The spelling of 129212476997 in words is "one hundred twenty-nine billion, two hundred twelve million, four hundred seventy-six thousand, nine hundred ninety-seven".