9881032714921 has 3 divisors (see below), whose sum is σ = 9881035858333. Its totient is φ = 9881029571510.

The previous prime is 9881032714913. The next prime is 9881032715051. The reversal of 9881032714921 is 1294172301889.

The square root of 9881032714921 is 3143411.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9881032714921 - 2³ = 9881032714913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9881032714121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1571706 + ... + 4715116.

Almost surely, 2^{9881032714921} is an apocalyptic number.

9881032714921 is the 3143411-st square number.

9881032714921 is the 1571706-th centered octagonal number.

It is an amenable number.

9881032714921 is a deficient number, since it is larger than the sum of its proper divisors (3143412).

9881032714921 is an frugal number, since it uses more digits than its factorization.

9881032714921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286822 (or 3143411 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 9881032714921 in words is "nine trillion, eight hundred eighty-one billion, thirty-two million, seven hundred fourteen thousand, nine hundred twenty-one".