231212001 has 16 divisors (see below), whose sum is σ = 318536064. Its totient is φ = 149065344.

The previous prime is 231211961. The next prime is 231212057. The reversal of 231212001 is 100212132.

It is not a de Polignac number, because 231212001 - 2⁹ = 231211489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231212071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12301 + ... + 24773.

It is an arithmetic number, because the mean of its divisors is an integer number (19908504).

Almost surely, 2^231212001 is an apocalyptic number.

It is an amenable number.

231212001 is a deficient number, since it is larger than the sum of its proper divisors (87324063).

231212001 is a wasteful number, since it uses less digits than its factorization.

231212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12680.

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

The square root of 231212001 is about 15205.6568749923. The cubic root of 231212001 is about 613.7668913543.

Adding to 231212001 its reverse (100212132), we get a palindrome (331424133).

The spelling of 231212001 in words is "two hundred thirty-one million, two hundred twelve thousand, one".