231321203133 has 16 divisors (see below), whose sum is σ = 317009729856. Its totient is φ = 149929868160.

The previous prime is 231321203123. The next prime is 231321203137. The reversal of 231321203133 is 331302123132.

It is not a de Polignac number, because 231321203133 - 2¹² = 231321199037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321203137) 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, 663816 + ... + 950417.

It is an arithmetic number, because the mean of its divisors is an integer number (19813108116).

Almost surely, 2^231321203133 is an apocalyptic number.

It is an amenable number.

231321203133 is a deficient number, since it is larger than the sum of its proper divisors (85688526723).

231321203133 is a wasteful number, since it uses less digits than its factorization.

231321203133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615564.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 231321203133 its reverse (331302123132), we get a palindrome (562623326265).

The spelling of 231321203133 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred three thousand, one hundred thirty-three".