113203121000 has 128 divisors (see below), whose sum is σ = 280514707200. Its totient is φ = 42639955200.

The previous prime is 113203120963. The next prime is 113203121027. The reversal of 113203121000 is 121302311.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3155162 + ... + 3190838.

It is an arithmetic number, because the mean of its divisors is an integer number (2191521150).

Almost surely, 2^113203121000 is an apocalyptic number.

113203121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113203121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140257353600).

113203121000 is an abundant number, since it is smaller than the sum of its proper divisors (167311586200).

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

113203121000 is a wasteful number, since it uses less digits than its factorization.

113203121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35884 (or 35870 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 113203121000 its reverse (121302311), we get a palindrome (113324423311).

The spelling of 113203121000 in words is "one hundred thirteen billion, two hundred three million, one hundred twenty-one thousand".