111220542 has 24 divisors (see below), whose sum is σ = 241179120. Its totient is φ = 37042560.

The previous prime is 111220531. The next prime is 111220559. The reversal of 111220542 is 245022111.

111220542 is a `hidden beast` number, since 1 + 1 + 122 + 0 + 542 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32367 + ... + 35637.

It is an arithmetic number, because the mean of its divisors is an integer number (10049130).

Almost surely, 2^111220542 is an apocalyptic number.

111220542 is an abundant number, since it is smaller than the sum of its proper divisors (129958578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111220542 is a wasteful number, since it uses less digits than its factorization.

111220542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 111220542 is about 10546.1150192855. The cubic root of 111220542 is about 480.9076316366.

Adding to 111220542 its reverse (245022111), we get a palindrome (356242653).

The spelling of 111220542 in words is "one hundred eleven million, two hundred twenty thousand, five hundred forty-two".