9991220032022 has 4 divisors (see below), whose sum is σ = 14986830048036. Its totient is φ = 4995610016010.

The previous prime is 9991220031959. The next prime is 9991220032091. The reversal of 9991220032022 is 2202300221999.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2497805008004 + ... + 2497805008007.

It is an arithmetic number, because the mean of its divisors is an integer number (3746707512009).

Almost surely, 2^{9991220032022} is an apocalyptic number.

9991220032022 is a deficient number, since it is larger than the sum of its proper divisors (4995610016014).

9991220032022 is a wasteful number, since it uses less digits than its factorization.

9991220032022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995610016013.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 9991220032022 in words is "nine trillion, nine hundred ninety-one billion, two hundred twenty million, thirty-two thousand, twenty-two".