221312023 has 2 divisors, whose sum is σ = 221312024. Its totient is φ = 221312022.

The previous prime is 221312011. The next prime is 221312027. The reversal of 221312023 is 320213122.

221312023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221312023 - 2⁵ = 221311991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221311988 and 221312006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221312027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656011 + 110656012.

It is an arithmetic number, because the mean of its divisors is an integer number (110656012).

Almost surely, 2^221312023 is an apocalyptic number.

221312023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312023 is an equidigital number, since it uses as much as digits as its factorization.

221312023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221312023 is about 14876.5595148878. The cubic root of 221312023 is about 604.8787617637.

Adding to 221312023 its reverse (320213122), we get a palindrome (541525145).

The spelling of 221312023 in words is "two hundred twenty-one million, three hundred twelve thousand, twenty-three".