231201013212 has 144 divisors (see below), whose sum is σ = 636128217088. Its totient is φ = 70380109440.

The previous prime is 231201013187. The next prime is 231201013247. The reversal of 231201013212 is 212310102132.

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 47 ways as a sum of consecutive naturals, for example, 17004537 + ... + 17018127.

Almost surely, 2^231201013212 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 231201013212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318064108544).

231201013212 is an abundant number, since it is smaller than the sum of its proper divisors (404927203876).

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

231201013212 is a wasteful number, since it uses less digits than its factorization.

231201013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14000 (or 13995 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231201013212 its reverse (212310102132), we get a palindrome (443511115344).

The spelling of 231201013212 in words is "two hundred thirty-one billion, two hundred one million, thirteen thousand, two hundred twelve".