111020112090 has 48 divisors (see below), whose sum is σ = 296453713608. Its totient is φ = 28805217408.

The previous prime is 111020112089. The next prime is 111020112113. The reversal of 111020112090 is 90211020111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 110623425201 + 396686889 = 332601^2 + 19917^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16666357 + ... + 16673016.

Almost surely, 2^111020112090 is an apocalyptic number.

111020112090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111020112090 is an abundant number, since it is smaller than the sum of its proper divisors (185433601518).

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

111020112090 is a wasteful number, since it uses less digits than its factorization.

111020112090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33339423 (or 33339420 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 111020112090 in words is "one hundred eleven billion, twenty million, one hundred twelve thousand, ninety".