131721156207 has 32 divisors (see below), whose sum is σ = 199978920960. Its totient is φ = 85639343040.

The previous prime is 131721156191. The next prime is 131721156209. The reversal of 131721156207 is 702651127131.

131721156207 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 21 + 1 + 5 + 620 + 7 = 666.

It is not a de Polignac number, because 131721156207 - 2⁴ = 131721156191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131721156209) 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, 3041568 + ... + 3084570.

It is an arithmetic number, because the mean of its divisors is an integer number (6249341280).

Almost surely, 2^131721156207 is an apocalyptic number.

131721156207 is a deficient number, since it is larger than the sum of its proper divisors (68257764753).

131721156207 is a wasteful number, since it uses less digits than its factorization.

131721156207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45820 (or 45814 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 131721156207 in words is "one hundred thirty-one billion, seven hundred twenty-one million, one hundred fifty-six thousand, two hundred seven".