1120121100 has 108 divisors (see below), whose sum is σ = 4012545264. Its totient is φ = 256026240.

The previous prime is 1120121099. The next prime is 1120121113. The reversal of 1120121100 is 11210211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82599 + ... + 95198.

Almost surely, 2^1120121100 is an apocalyptic number.

1120121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120121100 is an abundant number, since it is smaller than the sum of its proper divisors (2892424164).

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

1120121100 is a wasteful number, since it uses less digits than its factorization.

1120121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177824 (or 177814 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1120121100 is about 33468.2102897660. The cubic root of 1120121100 is about 1038.5362482496.

Adding to 1120121100 its reverse (11210211), we get a palindrome (1131331311).

The spelling of 1120121100 in words is "one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred".