21302001223 has 2 divisors, whose sum is σ = 21302001224. Its totient is φ = 21302001222.

The previous prime is 21302001197. The next prime is 21302001229. The reversal of 21302001223 is 32210020312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302001223 - 2⁵ = 21302001191 is a prime.

It is a super-2 number, since 2×21302001223² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21302001197 and 21302001206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302001229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651000611 + 10651000612.

It is an arithmetic number, because the mean of its divisors is an integer number (10651000612).

Almost surely, 2^21302001223 is an apocalyptic number.

21302001223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302001223 is an equidigital number, since it uses as much as digits as its factorization.

21302001223 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21302001223 its reverse (32210020312), we get a palindrome (53512021535).

The spelling of 21302001223 in words is "twenty-one billion, three hundred two million, one thousand, two hundred twenty-three".