111001101921 has 16 divisors (see below), whose sum is σ = 173101134400. Its totient is φ = 70105958784.

The previous prime is 111001101863. The next prime is 111001101961. The reversal of 111001101921 is 129101100111.

It is not a de Polignac number, because 111001101921 - 2⁶ = 111001101857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111001101894 and 111001101903.

It is not an unprimeable number, because it can be changed into a prime (111001101961) 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, 108187696 + ... + 108188721.

It is an arithmetic number, because the mean of its divisors is an integer number (10818820900).

Almost surely, 2^111001101921 is an apocalyptic number.

It is an amenable number.

111001101921 is a deficient number, since it is larger than the sum of its proper divisors (62100032479).

111001101921 is a wasteful number, since it uses less digits than its factorization.

111001101921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216376445 (or 216376439 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 18.

The spelling of 111001101921 in words is "one hundred eleven billion, one million, one hundred one thousand, nine hundred twenty-one".