231213120000 has 400 divisors, whose sum is σ = 773830819872. Its totient is φ = 61327360000.

The previous prime is 231213119993. The next prime is 231213120023. The reversal of 231213120000 is 21312132.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 217919470 + ... + 217920530.

Almost surely, 2^231213120000 is an apocalyptic number.

231213120000 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 231213120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386915409936).

231213120000 is an abundant number, since it is smaller than the sum of its proper divisors (542617699872).

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

231213120000 is an equidigital number, since it uses as much as digits as its factorization.

231213120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 231213120000 its reverse (21312132), we get a palindrome (231234432132).

The spelling of 231213120000 in words is "two hundred thirty-one billion, two hundred thirteen million, one hundred twenty thousand".