111021442 has 32 divisors (see below), whose sum is σ = 195858432. Its totient is φ = 46209744.

The previous prime is 111021439. The next prime is 111021457. The reversal of 111021442 is 244120111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133833 + ... + 134659.

It is an arithmetic number, because the mean of its divisors is an integer number (6120576).

Almost surely, 2^111021442 is an apocalyptic number.

111021442 is a deficient number, since it is larger than the sum of its proper divisors (84836990).

111021442 is a wasteful number, since it uses less digits than its factorization.

111021442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 111021442 is about 10536.6712960024. The cubic root of 111021442 is about 480.6204967271.

Adding to 111021442 its reverse (244120111), we get a palindrome (355141553).

It can be divided in two parts, 11102 and 1442, that added together give a square (12544 = 112²).

The spelling of 111021442 in words is "one hundred eleven million, twenty-one thousand, four hundred forty-two".