921127591111 has 12 divisors (see below), whose sum is σ = 1139924594352. Its totient is φ = 728804246976.

The previous prime is 921127591073. The next prime is 921127591171. The reversal of 921127591111 is 111195721129.

It is not a de Polignac number, because 921127591111 - 2²⁵ = 921094036679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921127591171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389317326 + ... + 389319691.

It is an arithmetic number, because the mean of its divisors is an integer number (94993716196).

Almost surely, 2^921127591111 is an apocalyptic number.

921127591111 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

921127591111 is a deficient number, since it is larger than the sum of its proper divisors (218797003241).

921127591111 is a wasteful number, since it uses less digits than its factorization.

921127591111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778637050 (or 778637037 counting only the distinct ones).

The product of its digits is 11340, while the sum is 40.

The spelling of 921127591111 in words is "nine hundred twenty-one billion, one hundred twenty-seven million, five hundred ninety-one thousand, one hundred eleven".