9901021110111 has 24 divisors (see below), whose sum is σ = 14367073368960. Its totient is φ = 6570473280000.

The previous prime is 9901021110107. The next prime is 9901021110133. The reversal of 9901021110111 is 1110111201099.

It is not a de Polignac number, because 9901021110111 - 2² = 9901021110107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901021110151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1134990 + ... + 4592411.

It is an arithmetic number, because the mean of its divisors is an integer number (598628057040).

Almost surely, 2^{9901021110111} is an apocalyptic number.

9901021110111 is a deficient number, since it is larger than the sum of its proper divisors (4466052258849).

9901021110111 is a wasteful number, since it uses less digits than its factorization.

9901021110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728287 (or 5728284 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 27.

The spelling of 9901021110111 in words is "nine trillion, nine hundred one billion, twenty-one million, one hundred ten thousand, one hundred eleven".