21200223229 has 2 divisors, whose sum is σ = 21200223230. Its totient is φ = 21200223228.

The previous prime is 21200223217. The next prime is 21200223263. The reversal of 21200223229 is 92232200212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19515531204 + 1684692025 = 139698^2 + 41045^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200223229 - 2⁹ = 21200222717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200223329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600111614 + 10600111615.

It is an arithmetic number, because the mean of its divisors is an integer number (10600111615).

Almost surely, 2^21200223229 is an apocalyptic number.

It is an amenable number.

21200223229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200223229 is an equidigital number, since it uses as much as digits as its factorization.

21200223229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 21200223229 in words is "twenty-one billion, two hundred million, two hundred twenty-three thousand, two hundred twenty-nine".