111921001 has 8 divisors (see below), whose sum is σ = 120035520. Its totient is φ = 104028912.

The previous prime is 111920989. The next prime is 111921011. The reversal of 111921001 is 100129111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111921001 - 2⁵ = 111920969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111921011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54565 + ... + 56578.

It is an arithmetic number, because the mean of its divisors is an integer number (15004440).

Almost surely, 2^111921001 is an apocalyptic number.

It is an amenable number.

111921001 is a deficient number, since it is larger than the sum of its proper divisors (8114519).

111921001 is a wasteful number, since it uses less digits than its factorization.

111921001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111215.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 111921001 is about 10579.2722339488. The cubic root of 111921001 is about 481.9150935421.

The spelling of 111921001 in words is "one hundred eleven million, nine hundred twenty-one thousand, one".