121312031211120 has 80 divisors (see below), whose sum is σ = 376068721302432. Its totient is φ = 32349752448000.

The previous prime is 121312031211109. The next prime is 121312031211127. The reversal of 121312031211120 is 21112130213121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312031211127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75091870 + ... + 76690370.

Almost surely, 2^{121312031211120} is an apocalyptic number.

121312031211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121312031211120 is an abundant number, since it is smaller than the sum of its proper divisors (254756690091312).

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

121312031211120 is a wasteful number, since it uses less digits than its factorization.

121312031211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914730 (or 1914724 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 121312031211120 its reverse (21112130213121), we get a palindrome (142424161424241).

The spelling of 121312031211120 in words is "one hundred twenty-one trillion, three hundred twelve billion, thirty-one million, two hundred eleven thousand, one hundred twenty".