21221112023 has 2 divisors, whose sum is σ = 21221112024. Its totient is φ = 21221112022.

The previous prime is 21221112001. The next prime is 21221112037. The reversal of 21221112023 is 32021112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221112023 - 2⁶ = 21221111959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221111992 and 21221112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221112623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610556011 + 10610556012.

It is an arithmetic number, because the mean of its divisors is an integer number (10610556012).

Almost surely, 2^21221112023 is an apocalyptic number.

21221112023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221112023 is an equidigital number, since it uses as much as digits as its factorization.

21221112023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21221112023 its reverse (32021112212), we get a palindrome (53242224235).

The spelling of 21221112023 in words is "twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, twenty-three".