1203121321100 has 18 divisors (see below), whose sum is σ = 2610773267004. Its totient is φ = 481248528400.

The previous prime is 1203121321093. The next prime is 1203121321163. The reversal of 1203121321100 is 11231213021.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6015606506 + ... + 6015606705.

It is an arithmetic number, because the mean of its divisors is an integer number (145042959278).

Almost surely, 2^{1203121321100} is an apocalyptic number.

1203121321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203121321100 is an abundant number, since it is smaller than the sum of its proper divisors (1407651945904).

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

1203121321100 is a wasteful number, since it uses less digits than its factorization.

1203121321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12031213225 (or 12031213218 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1203121321100 its reverse (11231213021), we get a palindrome (1214352534121).

The spelling of 1203121321100 in words is "one trillion, two hundred three billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred".