1121275900 has 18 divisors (see below), whose sum is σ = 2433168920. Its totient is φ = 448510320.

The previous prime is 1121275891. The next prime is 1121275901. The reversal of 1121275900 is 95721211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121275901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5606280 + ... + 5606479.

Almost surely, 2^1121275900 is an apocalyptic number.

1121275900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121275900 is an abundant number, since it is smaller than the sum of its proper divisors (1311893020).

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

1121275900 is a wasteful number, since it uses less digits than its factorization.

1121275900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212773 (or 11212766 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 1121275900 is about 33485.4580377811. The cubic root of 1121275900 is about 1038.8930220994.

The spelling of 1121275900 in words is "one billion, one hundred twenty-one million, two hundred seventy-five thousand, nine hundred".