21210222259 has 2 divisors, whose sum is σ = 21210222260. Its totient is φ = 21210222258.

The previous prime is 21210222211. The next prime is 21210222263. The reversal of 21210222259 is 95222201212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210222259 - 2¹¹ = 21210220211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210222359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605111129 + 10605111130.

It is an arithmetic number, because the mean of its divisors is an integer number (10605111130).

Almost surely, 2^21210222259 is an apocalyptic number.

21210222259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210222259 is an equidigital number, since it uses as much as digits as its factorization.

21210222259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 21210222259 in words is "twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred fifty-nine".