231211201 has 16 divisors (see below), whose sum is σ = 252983808. Its totient is φ = 210038400.

The previous prime is 231211193. The next prime is 231211219. The reversal of 231211201 is 102112132.

It is not a de Polignac number, because 231211201 - 2³ = 231211193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231211291) 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, 232816 + ... + 233806.

It is an arithmetic number, because the mean of its divisors is an integer number (15811488).

Almost surely, 2^231211201 is an apocalyptic number.

It is an amenable number.

231211201 is a deficient number, since it is larger than the sum of its proper divisors (21772607).

231211201 is a wasteful number, since it uses less digits than its factorization.

231211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 231211201 is about 15205.6305689702. The cubic root of 231211201 is about 613.7661834700.

Adding to 231211201 its reverse (102112132), we get a palindrome (333323333).

The spelling of 231211201 in words is "two hundred thirty-one million, two hundred eleven thousand, two hundred one".