111215941 has 4 divisors (see below), whose sum is σ = 114803584. Its totient is φ = 107628300.

The previous prime is 111215939. The next prime is 111215981. The reversal of 111215941 is 149512111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 149512111 = 7 ⋅21358873.

It is a cyclic number.

It is not a de Polignac number, because 111215941 - 2¹ = 111215939 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 (111215981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1793775 + ... + 1793836.

It is an arithmetic number, because the mean of its divisors is an integer number (28700896).

Almost surely, 2^111215941 is an apocalyptic number.

It is an amenable number.

111215941 is a deficient number, since it is larger than the sum of its proper divisors (3587643).

111215941 is an equidigital number, since it uses as much as digits as its factorization.

111215941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3587642.

The product of its digits is 360, while the sum is 25.

The square root of 111215941 is about 10545.8968798296. The cubic root of 111215941 is about 480.9010001083.

The spelling of 111215941 in words is "one hundred eleven million, two hundred fifteen thousand, nine hundred forty-one".