231121121013200 has 360 divisors, whose sum is σ = 649622476500480. Its totient is φ = 78686085632000.

The previous prime is 231121121013137. The next prime is 231121121013221. The reversal of 231121121013200 is 2310121121132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 156419471 + ... + 157890129.

It is an arithmetic number, because the mean of its divisors is an integer number (1804506879168).

Almost surely, 2^{231121121013200} is an apocalyptic number.

231121121013200 is a gapful number since it is divisible by the number (20) 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 231121121013200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324811238250240).

231121121013200 is an abundant number, since it is smaller than the sum of its proper divisors (418501355487280).

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

231121121013200 is a wasteful number, since it uses less digits than its factorization.

231121121013200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470907 (or 1470885 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 231121121013200 its reverse (2310121121132), we get a palindrome (233431242134332).

The spelling of 231121121013200 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, thirteen thousand, two hundred".