21036252296077 has 2 divisors, whose sum is σ = 21036252296078. Its totient is φ = 21036252296076.

The previous prime is 21036252296071. The next prime is 21036252296107. The reversal of 21036252296077 is 77069225263012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21035193379396 + 1058916681 = 4586414^2 + 32541^2 .

It is a cyclic number.

It is not a de Polignac number, because 21036252296077 - 2³ = 21036252296069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21036252296071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518126148038 + 10518126148039.

It is an arithmetic number, because the mean of its divisors is an integer number (10518126148039).

Almost surely, 2^{21036252296077} is an apocalyptic number.

It is an amenable number.

21036252296077 is a deficient number, since it is larger than the sum of its proper divisors (1).

21036252296077 is an equidigital number, since it uses as much as digits as its factorization.

21036252296077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 21036252296077 in words is "twenty-one trillion, thirty-six billion, two hundred fifty-two million, two hundred ninety-six thousand, seventy-seven".