1121031100 has 36 divisors (see below), whose sum is σ = 2780158864. Its totient is φ = 384353280.

The previous prime is 1121031073. The next prime is 1121031127. The reversal of 1121031100 is 11301211.

It is an interprime number because it is at equal distance from previous prime (1121031073) and next prime (1121031127).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 800037 + ... + 801436.

Almost surely, 2^1121031100 is an apocalyptic number.

1121031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121031100 is an abundant number, since it is smaller than the sum of its proper divisors (1659127764).

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

1121031100 is a wasteful number, since it uses less digits than its factorization.

1121031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601494 (or 1601487 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1121031100 is about 33481.8025201750. The cubic root of 1121031100 is about 1038.8174119479.

Adding to 1121031100 its reverse (11301211), we get a palindrome (1132332311).

The spelling of 1121031100 in words is "one billion, one hundred twenty-one million, thirty-one thousand, one hundred".