130921217297784 has 160 divisors (see below), whose sum is σ = 373632509028240. Its totient is φ = 42815512396800.

The previous prime is 130921217297737. The next prime is 130921217297833. The reversal of 130921217297784 is 487792712129031.

130921217297784 is a `hidden beast` number, since 1 + 30 + 9 + 21 + 217 + 297 + 7 + 84 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1446901824 + ... + 1446992304.

Almost surely, 2^{130921217297784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130921217297784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186816254514120).

130921217297784 is an abundant number, since it is smaller than the sum of its proper divisors (242711291730456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130921217297784 is a wasteful number, since it uses less digits than its factorization.

130921217297784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132683 (or 132670 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 130921217297784 in words is "one hundred thirty trillion, nine hundred twenty-one billion, two hundred seventeen million, two hundred ninety-seven thousand, seven hundred eighty-four".