231330001212 has 72 divisors (see below), whose sum is σ = 596999697840. Its totient is φ = 75500705280.

The previous prime is 231330001183. The next prime is 231330001223. The reversal of 231330001212 is 212100033132.

231330001212 is digitally balanced in base 3, because in such base 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 (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 813364 + ... + 1060292.

It is an arithmetic number, because the mean of its divisors is an integer number (8291662470).

Almost surely, 2^231330001212 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 231330001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298499848920).

231330001212 is an abundant number, since it is smaller than the sum of its proper divisors (365669696628).

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

231330001212 is a wasteful number, since it uses less digits than its factorization.

231330001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247483 (or 247478 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231330001212 its reverse (212100033132), we get a palindrome (443430034344).

The spelling of 231330001212 in words is "two hundred thirty-one billion, three hundred thirty million, one thousand, two hundred twelve".