9921243292 has 12 divisors (see below), whose sum is σ = 18117053136. Its totient is φ = 4744942400.

The previous prime is 9921243253. The next prime is 9921243349. The reversal of 9921243292 is 2923421299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53919709 + ... + 53919892.

It is an arithmetic number, because the mean of its divisors is an integer number (1509754428).

Almost surely, 2^9921243292 is an apocalyptic number.

9921243292 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9921243292 is a deficient number, since it is larger than the sum of its proper divisors (8195809844).

9921243292 is a wasteful number, since it uses less digits than its factorization.

9921243292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107839628 (or 107839626 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 9921243292 is about 99605.4380643949. The cubic root of 9921243292 is about 2148.7639039999.

The spelling of 9921243292 in words is "nine billion, nine hundred twenty-one million, two hundred forty-three thousand, two hundred ninety-two".