21452872129291 has 2 divisors, whose sum is σ = 21452872129292. Its totient is φ = 21452872129290.

The previous prime is 21452872129229. The next prime is 21452872129307. The reversal of 21452872129291 is 19292127825412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21452872129291 - 2⁷ = 21452872129163 is a prime.

It is not a weakly prime, because it can be changed into another prime (21452872129891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726436064645 + 10726436064646.

It is an arithmetic number, because the mean of its divisors is an integer number (10726436064646).

Almost surely, 2^{21452872129291} is an apocalyptic number.

21452872129291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452872129291 is an equidigital number, since it uses as much as digits as its factorization.

21452872129291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The spelling of 21452872129291 in words is "twenty-one trillion, four hundred fifty-two billion, eight hundred seventy-two million, one hundred twenty-nine thousand, two hundred ninety-one".