111012421 has 16 divisors (see below), whose sum is σ = 131322240. Its totient is φ = 92854080.

The previous prime is 111012403. The next prime is 111012427. The reversal of 111012421 is 124210111.

It is a cyclic number.

It is not a de Polignac number, because 111012421 - 2⁵ = 111012389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4090 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (8207640).

Almost surely, 2^111012421 is an apocalyptic number.

It is an amenable number.

111012421 is a deficient number, since it is larger than the sum of its proper divisors (20309819).

111012421 is a wasteful number, since it uses less digits than its factorization.

111012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19596.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 111012421 is about 10536.2432109362. The cubic root of 111012421 is about 480.6074788366.

Adding to 111012421 its reverse (124210111), we get a palindrome (235222532).

It can be divided in two parts, 1110 and 12421, that added together give a palindrome (13531).

The spelling of 111012421 in words is "one hundred eleven million, twelve thousand, four hundred twenty-one".