231001231133 has 2 divisors, whose sum is σ = 231001231134. Its totient is φ = 231001231132.

The previous prime is 231001231103. The next prime is 231001231159. The reversal of 231001231133 is 331132100132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225399906169 + 5601324964 = 474763^2 + 74842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231001231133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231001231103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500615566 + 115500615567.

It is an arithmetic number, because the mean of its divisors is an integer number (115500615567).

Almost surely, 2^231001231133 is an apocalyptic number.

It is an amenable number.

231001231133 is a deficient number, since it is larger than the sum of its proper divisors (1).

231001231133 is an equidigital number, since it uses as much as digits as its factorization.

231001231133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 231001231133 its reverse (331132100132), we get a palindrome (562133331265).

The spelling of 231001231133 in words is "two hundred thirty-one billion, one million, two hundred thirty-one thousand, one hundred thirty-three".