21230224429 has 2 divisors, whose sum is σ = 21230224430. Its totient is φ = 21230224428.

The previous prime is 21230224417. The next prime is 21230224511. The reversal of 21230224429 is 92442203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20938668804 + 291555625 = 144702^2 + 17075^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230224429 - 2²⁹ = 20693353517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230224429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21237224429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615112214 + 10615112215.

It is an arithmetic number, because the mean of its divisors is an integer number (10615112215).

Almost surely, 2^21230224429 is an apocalyptic number.

It is an amenable number.

21230224429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230224429 is an equidigital number, since it uses as much as digits as its factorization.

21230224429 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 21230224429 in words is "twenty-one billion, two hundred thirty million, two hundred twenty-four thousand, four hundred twenty-nine".