231133311331231 has 2 divisors, whose sum is σ = 231133311331232. Its totient is φ = 231133311331230.

The previous prime is 231133311331201. The next prime is 231133311331249. The reversal of 231133311331231 is 132133113331132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231133311331231 - 2⁷ = 231133311331103 is a prime.

It is a super-2 number, since 2×231133311331231² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231133311331193 and 231133311331202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231133311331201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566655665615 + 115566655665616.

It is an arithmetic number, because the mean of its divisors is an integer number (115566655665616).

Almost surely, 2^{231133311331231} is an apocalyptic number.

231133311331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

231133311331231 is an equidigital number, since it uses as much as digits as its factorization.

231133311331231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 31.

Adding to 231133311331231 its reverse (132133113331132), we get a palindrome (363266424662363).

The spelling of 231133311331231 in words is "two hundred thirty-one trillion, one hundred thirty-three billion, three hundred eleven million, three hundred thirty-one thousand, two hundred thirty-one".