21224612263 has 2 divisors, whose sum is σ = 21224612264. Its totient is φ = 21224612262.

The previous prime is 21224612209. The next prime is 21224612309. The reversal of 21224612263 is 36221642212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21224612263 - 2²⁵ = 21191057831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21224612203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612306131 + 10612306132.

It is an arithmetic number, because the mean of its divisors is an integer number (10612306132).

Almost surely, 2^21224612263 is an apocalyptic number.

21224612263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224612263 is an equidigital number, since it uses as much as digits as its factorization.

21224612263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

The spelling of 21224612263 in words is "twenty-one billion, two hundred twenty-four million, six hundred twelve thousand, two hundred sixty-three".