231120223331 has 2 divisors, whose sum is σ = 231120223332. Its totient is φ = 231120223330.

The previous prime is 231120223319. The next prime is 231120223363. The reversal of 231120223331 is 133322021132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231120223331 is a prime.

It is a super-2 number, since 2×231120223331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231120223297 and 231120223306.

It is not a weakly prime, because it can be changed into another prime (231120223031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560111665 + 115560111666.

It is an arithmetic number, because the mean of its divisors is an integer number (115560111666).

Almost surely, 2^231120223331 is an apocalyptic number.

231120223331 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120223331 is an equidigital number, since it uses as much as digits as its factorization.

231120223331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231120223331 its reverse (133322021132), we get a palindrome (364442244463).

The spelling of 231120223331 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred twenty-three thousand, three hundred thirty-one".