121103203231312 has 160 divisors (see below), whose sum is σ = 267486609225600. Its totient is φ = 52765452140544.

The previous prime is 121103203231289. The next prime is 121103203231337. The reversal of 121103203231312 is 213132302301121.

It is a congruent number.

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, 69533139 + ... + 71253517.

It is an arithmetic number, because the mean of its divisors is an integer number (1671791307660).

Almost surely, 2^{121103203231312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121103203231312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133743304612800).

121103203231312 is an abundant number, since it is smaller than the sum of its proper divisors (146383405994288).

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

121103203231312 is a wasteful number, since it uses less digits than its factorization.

121103203231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720733 (or 1720727 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 121103203231312 its reverse (213132302301121), we get a palindrome (334235505532433).

The spelling of 121103203231312 in words is "one hundred twenty-one trillion, one hundred three billion, two hundred three million, two hundred thirty-one thousand, three hundred twelve".