9900021313 has 16 divisors (see below), whose sum is σ = 12305293056. Its totient is φ = 7755422400.

The previous prime is 9900021311. The next prime is 9900021323. The reversal of 9900021313 is 3131200099.

It is a cyclic number.

It is not a de Polignac number, because 9900021313 - 2¹ = 9900021311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9900021311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529381 + ... + 547762.

It is an arithmetic number, because the mean of its divisors is an integer number (769080816).

Almost surely, 2^9900021313 is an apocalyptic number.

It is an amenable number.

9900021313 is a deficient number, since it is larger than the sum of its proper divisors (2405271743).

9900021313 is a wasteful number, since it uses less digits than its factorization.

9900021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077264.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 9900021313 is about 99498.8508124591. The cubic root of 9900021313 is about 2147.2307098897.

The spelling of 9900021313 in words is "nine billion, nine hundred million, twenty-one thousand, three hundred thirteen".