129211768651 has 32 divisors (see below), whose sum is σ = 150614650368. Its totient is φ = 108569207040.

The previous prime is 129211768547. The next prime is 129211768663. The reversal of 129211768651 is 156867112921.

It is not a de Polignac number, because 129211768651 - 2⁹ = 129211768139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129211768595 and 129211768604.

It is not an unprimeable number, because it can be changed into a prime (129211768681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42911736 + ... + 42914746.

It is an arithmetic number, because the mean of its divisors is an integer number (4706707824).

Almost surely, 2^129211768651 is an apocalyptic number.

129211768651 is a deficient number, since it is larger than the sum of its proper divisors (21402881717).

129211768651 is a wasteful number, since it uses less digits than its factorization.

129211768651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651.

The product of its digits is 362880, while the sum is 49.

The spelling of 129211768651 in words is "one hundred twenty-nine billion, two hundred eleven million, seven hundred sixty-eight thousand, six hundred fifty-one".