111252021 has 4 divisors (see below), whose sum is σ = 148336032. Its totient is φ = 74168012.

The previous prime is 111251981. The next prime is 111252041. The reversal of 111252021 is 120252111.

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.

It is a cyclic number.

It is not a de Polignac number, because 111252021 - 2⁶ = 111251957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111252041) 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, 18542001 + ... + 18542006.

It is an arithmetic number, because the mean of its divisors is an integer number (37084008).

Almost surely, 2^111252021 is an apocalyptic number.

It is an amenable number.

111252021 is a deficient number, since it is larger than the sum of its proper divisors (37084011).

111252021 is an equidigital number, since it uses as much as digits as its factorization.

111252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37084010.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 111252021 is about 10547.6073590175. The cubic root of 111252021 is about 480.9529981461.

The spelling of 111252021 in words is "one hundred eleven million, two hundred fifty-two thousand, twenty-one".