21130024291 has 2 divisors, whose sum is σ = 21130024292. Its totient is φ = 21130024290.

The previous prime is 21130024273. The next prime is 21130024303. The reversal of 21130024291 is 19242003112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130024291 - 2⁹ = 21130023779 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130024211) 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, 10565012145 + 10565012146.

It is an arithmetic number, because the mean of its divisors is an integer number (10565012146).

Almost surely, 2^21130024291 is an apocalyptic number.

21130024291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130024291 is an equidigital number, since it uses as much as digits as its factorization.

21130024291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21130024291 in words is "twenty-one billion, one hundred thirty million, twenty-four thousand, two hundred ninety-one".