111421636 has 12 divisors (see below), whose sum is σ = 195568828. Its totient is φ = 55544832.

The previous prime is 111421619. The next prime is 111421691. The reversal of 111421636 is 636124111.

It can be written as a sum of positive squares in 2 ways, for example, as 48219136 + 63202500 = 6944^2 + 7950^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111421636.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39981 + ... + 42676.

Almost surely, 2^111421636 is an apocalyptic number.

It is an amenable number.

111421636 is a deficient number, since it is larger than the sum of its proper divisors (84147192).

111421636 is a wasteful number, since it uses less digits than its factorization.

111421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82998 (or 82996 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 111421636 is about 10555.6447458220. The cubic root of 111421636 is about 481.1972945935.

Adding to 111421636 its reverse (636124111), we get a palindrome (747545747).

The spelling of 111421636 in words is "one hundred eleven million, four hundred twenty-one thousand, six hundred thirty-six".