21422513291 has 2 divisors, whose sum is σ = 21422513292. Its totient is φ = 21422513290.

The previous prime is 21422513267. The next prime is 21422513303. The reversal of 21422513291 is 19231522412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21422513291 is a prime.

It is a super-3 number, since 3×21422513291³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21422513221) 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, 10711256645 + 10711256646.

It is an arithmetic number, because the mean of its divisors is an integer number (10711256646).

Almost surely, 2^21422513291 is an apocalyptic number.

21422513291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422513291 is an equidigital number, since it uses as much as digits as its factorization.

21422513291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The spelling of 21422513291 in words is "twenty-one billion, four hundred twenty-two million, five hundred thirteen thousand, two hundred ninety-one".