11121012090 has 24 divisors (see below), whose sum is σ = 28914631668. Its totient is φ = 2965603200.

The previous prime is 11121012079. The next prime is 11121012107. The reversal of 11121012090 is 9021012111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9627730641 + 1493281449 = 98121^2 + 38643^2 .

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

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, 61783311 + ... + 61783490.

Almost surely, 2^11121012090 is an apocalyptic number.

11121012090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121012090 is an abundant number, since it is smaller than the sum of its proper divisors (17793619578).

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

11121012090 is a wasteful number, since it uses less digits than its factorization.

11121012090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123566814 (or 123566811 counting only the distinct ones).

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

The spelling of 11121012090 in words is "eleven billion, one hundred twenty-one million, twelve thousand, ninety".