231120213000 has 128 divisors (see below), whose sum is σ = 723700897920. Its totient is φ = 61409337600.

The previous prime is 231120212963. The next prime is 231120213007. The reversal of 231120213000 is 312021132.

231120213000 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (231120213007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691939 + ... + 970061.

It is an arithmetic number, because the mean of its divisors is an integer number (5653913265).

Almost surely, 2^231120213000 is an apocalyptic number.

231120213000 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 231120213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361850448960).

231120213000 is an abundant number, since it is smaller than the sum of its proper divisors (492580684920).

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

231120213000 is a wasteful number, since it uses less digits than its factorization.

231120213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278424 (or 278410 counting only the distinct ones).

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

Adding to 231120213000 its reverse (312021132), we get a palindrome (231432234132).

The spelling of 231120213000 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred thirteen thousand".