111020051 has 4 divisors (see below), whose sum is σ = 111412632. Its totient is φ = 110627472.

The previous prime is 111020029. The next prime is 111020111. The reversal of 111020051 is 150020111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111020051 - 2¹⁴ = 111003667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111040051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195866 + ... + 196431.

It is an arithmetic number, because the mean of its divisors is an integer number (27853158).

Almost surely, 2^111020051 is an apocalyptic number.

111020051 is a deficient number, since it is larger than the sum of its proper divisors (392581).

111020051 is an equidigital number, since it uses as much as digits as its factorization.

111020051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392580.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 111020051 is about 10536.6052882321. The cubic root of 111020051 is about 480.6184894695.

Adding to 111020051 its reverse (150020111), we get a palindrome (261040162).

The spelling of 111020051 in words is "one hundred eleven million, twenty thousand, fifty-one".