21227026871 has 2 divisors, whose sum is σ = 21227026872. Its totient is φ = 21227026870.

The previous prime is 21227026759. The next prime is 21227026889. The reversal of 21227026871 is 17862072212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21227026871 - 2²² = 21222832567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21227022871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613513435 + 10613513436.

It is an arithmetic number, because the mean of its divisors is an integer number (10613513436).

Almost surely, 2^21227026871 is an apocalyptic number.

21227026871 is a deficient number, since it is larger than the sum of its proper divisors (1).

21227026871 is an equidigital number, since it uses as much as digits as its factorization.

21227026871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 21227026871 in words is "twenty-one billion, two hundred twenty-seven million, twenty-six thousand, eight hundred seventy-one".