113121231100 has 18 divisors (see below), whose sum is σ = 245473071704. Its totient is φ = 45248492400.

The previous prime is 113121231079. The next prime is 113121231121. The reversal of 113121231100 is 1132121311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (113121231079) and next prime (113121231121).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565606056 + ... + 565606255.

Almost surely, 2^113121231100 is an apocalyptic number.

113121231100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113121231100 is an abundant number, since it is smaller than the sum of its proper divisors (132351840604).

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

113121231100 is a wasteful number, since it uses less digits than its factorization.

113121231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131212325 (or 1131212318 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 113121231100 its reverse (1132121311), we get a palindrome (114253352411).

The spelling of 113121231100 in words is "one hundred thirteen billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred".