21056022139027 has 2 divisors, whose sum is σ = 21056022139028. Its totient is φ = 21056022139026.

The previous prime is 21056022138997. The next prime is 21056022139049. The reversal of 21056022139027 is 72093122065012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21056022139027 - 2²³ = 21056013750419 is a prime.

It is not a weakly prime, because it can be changed into another prime (21056622139027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10528011069513 + 10528011069514.

It is an arithmetic number, because the mean of its divisors is an integer number (10528011069514).

Almost surely, 2^{21056022139027} is an apocalyptic number.

21056022139027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21056022139027 is an equidigital number, since it uses as much as digits as its factorization.

21056022139027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 21056022139027 in words is "twenty-one trillion, fifty-six billion, twenty-two million, one hundred thirty-nine thousand, twenty-seven".