21125636531183 has 2 divisors, whose sum is σ = 21125636531184. Its totient is φ = 21125636531182.

The previous prime is 21125636531143. The next prime is 21125636531189. The reversal of 21125636531183 is 38113563652112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21125636531183 - 2⁸ = 21125636530927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21125636531189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562818265591 + 10562818265592.

It is an arithmetic number, because the mean of its divisors is an integer number (10562818265592).

Almost surely, 2^{21125636531183} is an apocalyptic number.

21125636531183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21125636531183 is an equidigital number, since it uses as much as digits as its factorization.

21125636531183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The spelling of 21125636531183 in words is "twenty-one trillion, one hundred twenty-five billion, six hundred thirty-six million, five hundred thirty-one thousand, one hundred eighty-three".