231001212 has 96 divisors (see below), whose sum is σ = 615860224. Its totient is φ = 66873600.

The previous prime is 231001187. The next prime is 231001223. The reversal of 231001212 is 212100132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178287 + ... + 179577.

Almost surely, 2^231001212 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 231001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307930112).

231001212 is an abundant number, since it is smaller than the sum of its proper divisors (384859012).

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

231001212 is a wasteful number, since it uses less digits than its factorization.

231001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 231001212 is about 15198.7240253911. The cubic root of 231001212 is about 613.5803170639.

Adding to 231001212 its reverse (212100132), we get a palindrome (443101344).

The spelling of 231001212 in words is "two hundred thirty-one million, one thousand, two hundred twelve".