1101121992 has 32 divisors (see below), whose sum is σ = 3058672800. Its totient is φ = 367040592.

The previous prime is 1101121951. The next prime is 1101122003. The reversal of 1101121992 is 2991211011.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2548678 + ... + 2549109.

It is an arithmetic number, because the mean of its divisors is an integer number (95583525).

Almost surely, 2^1101121992 is an apocalyptic number.

1101121992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1101121992 is an abundant number, since it is smaller than the sum of its proper divisors (1957550808).

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

1101121992 is a wasteful number, since it uses less digits than its factorization.

1101121992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097802 (or 5097792 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The square root of 1101121992 is about 33183.1582583696. The cubic root of 1101121992 is about 1032.6309689308.

The spelling of 1101121992 in words is "one billion, one hundred one million, one hundred twenty-one thousand, nine hundred ninety-two".