231121320223 has 2 divisors, whose sum is σ = 231121320224. Its totient is φ = 231121320222.

The previous prime is 231121320091. The next prime is 231121320233. The reversal of 231121320223 is 322023121132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231121320223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231121320194 and 231121320203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231121320233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560660111 + 115560660112.

It is an arithmetic number, because the mean of its divisors is an integer number (115560660112).

Almost surely, 2^231121320223 is an apocalyptic number.

231121320223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231121320223 is an equidigital number, since it uses as much as digits as its factorization.

231121320223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231121320223 its reverse (322023121132), we get a palindrome (553144441355).

The spelling of 231121320223 in words is "two hundred thirty-one billion, one hundred twenty-one million, three hundred twenty thousand, two hundred twenty-three".