111090109021 has 8 divisors (see below), whose sum is σ = 111190464000. Its totient is φ = 110989792032.

The previous prime is 111090109007. The next prime is 111090109103. The reversal of 111090109021 is 120901090111.

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 111090109021 - 2⁵ = 111090108989 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 (111090109421) 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, 10777156 + ... + 10787458.

It is an arithmetic number, because the mean of its divisors is an integer number (13898808000).

Almost surely, 2^111090109021 is an apocalyptic number.

It is an amenable number.

111090109021 is a deficient number, since it is larger than the sum of its proper divisors (100354979).

111090109021 is a wasteful number, since it uses less digits than its factorization.

111090109021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18995.

The product of its (nonzero) digits is 162, while the sum is 25.

Adding to 111090109021 its reverse (120901090111), we get a palindrome (231991199132).

The spelling of 111090109021 in words is "one hundred eleven billion, ninety million, one hundred nine thousand, twenty-one".