21130022429 has 2 divisors, whose sum is σ = 21130022430. Its totient is φ = 21130022428.

The previous prime is 21130022413. The next prime is 21130022477. The reversal of 21130022429 is 92422003112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20794216804 + 335805625 = 144202^2 + 18325^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130022429 - 2⁴ = 21130022413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130022398 and 21130022407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130022729) 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 as a sum of consecutive naturals, namely, 10565011214 + 10565011215.

It is an arithmetic number, because the mean of its divisors is an integer number (10565011215).

Almost surely, 2^21130022429 is an apocalyptic number.

It is an amenable number.

21130022429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130022429 is an equidigital number, since it uses as much as digits as its factorization.

21130022429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21130022429 in words is "twenty-one billion, one hundred thirty million, twenty-two thousand, four hundred twenty-nine".