21200221223 has 8 divisors (see below), whose sum is σ = 22320921600. Its totient is φ = 20080010808.

The previous prime is 21200221213. The next prime is 21200221253. The reversal of 21200221223 is 32212200212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21200221223 - 2¹² = 21200217127 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 (21200221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31943 + ... + 208376.

It is an arithmetic number, because the mean of its divisors is an integer number (2790115200).

Almost surely, 2^21200221223 is an apocalyptic number.

21200221223 is a deficient number, since it is larger than the sum of its proper divisors (1120700377).

21200221223 is a wasteful number, since it uses less digits than its factorization.

21200221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244981.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21200221223 its reverse (32212200212), we get a palindrome (53412421435).

The spelling of 21200221223 in words is "twenty-one billion, two hundred million, two hundred twenty-one thousand, two hundred twenty-three".