1112121090 has 96 divisors (see below), whose sum is σ = 3049824960. Its totient is φ = 291501504.

The previous prime is 1112121089. The next prime is 1112121103. The reversal of 1112121090 is 901212111.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 139492 + ... + 147248.

It is an arithmetic number, because the mean of its divisors is an integer number (31769010).

Almost surely, 2^1112121090 is an apocalyptic number.

1112121090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1112121090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524912480).

1112121090 is an abundant number, since it is smaller than the sum of its proper divisors (1937703870).

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

1112121090 is an equidigital number, since it uses as much as digits as its factorization.

1112121090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838 (or 7826 counting only the distinct ones).

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

The square root of 1112121090 is about 33348.4795755369. The cubic root of 1112121090 is about 1036.0578975360.

The spelling of 1112121090 in words is "one billion, one hundred twelve million, one hundred twenty-one thousand, ninety".