111213990 has 24 divisors (see below), whose sum is σ = 289156608. Its totient is φ = 29657040.

The previous prime is 111213961. The next prime is 111214003. The reversal of 111213990 is 99312111.

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, 617766 + ... + 617945.

It is an arithmetic number, because the mean of its divisors is an integer number (12048192).

Almost surely, 2^111213990 is an apocalyptic number.

111213990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111213990 is an abundant number, since it is smaller than the sum of its proper divisors (177942618).

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

111213990 is a wasteful number, since it uses less digits than its factorization.

111213990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235724 (or 1235721 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 111213990 is about 10545.8043789936. The cubic root of 111213990 is about 480.8981880314.

The spelling of 111213990 in words is "one hundred eleven million, two hundred thirteen thousand, nine hundred ninety".