9912402131 has 4 divisors (see below), whose sum is σ = 10123304352. Its totient is φ = 9701499912.

The previous prime is 9912402119. The next prime is 9912402133. The reversal of 9912402131 is 1312042199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9912402131 is a prime.

It is a super-2 number, since 2×9912402131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912402133) 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, 105451040 + ... + 105451133.

It is an arithmetic number, because the mean of its divisors is an integer number (2530826088).

Almost surely, 2^9912402131 is an apocalyptic number.

9912402131 is a deficient number, since it is larger than the sum of its proper divisors (210902221).

9912402131 is a wasteful number, since it uses less digits than its factorization.

9912402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210902220.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 9912402131 is about 99561.0472574490. The cubic root of 9912402131 is about 2148.1254351780.

The spelling of 9912402131 in words is "nine billion, nine hundred twelve million, four hundred two thousand, one hundred thirty-one".