21203313221223 has 12 divisors (see below), whose sum is σ = 35002294841488. Its totient is φ = 12116178983520.

The previous prime is 21203313221219. The next prime is 21203313221227. The reversal of 21203313221223 is 32212231330212.

21203313221223 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 331 + 322 + 1 + 2 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (21203313221219) and next prime (21203313221227).

It is not a de Polignac number, because 21203313221223 - 2² = 21203313221219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203313221227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168280263598 + ... + 168280263723.

Almost surely, 2^{21203313221223} is an apocalyptic number.

21203313221223 is a deficient number, since it is larger than the sum of its proper divisors (13798981620265).

21203313221223 is a wasteful number, since it uses less digits than its factorization.

21203313221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336560527334 (or 336560527331 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21203313221223 its reverse (32212231330212), we get a palindrome (53415544551435).

The spelling of 21203313221223 in words is "twenty-one trillion, two hundred three billion, three hundred thirteen million, two hundred twenty-one thousand, two hundred twenty-three".