21335990100629 has 2 divisors, whose sum is σ = 21335990100630. Its totient is φ = 21335990100628.

The previous prime is 21335990100527. The next prime is 21335990100697. The reversal of 21335990100629 is 92600109953312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11548646788900 + 9787343311729 = 3398330^2 + 3128473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21335990100629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21335990180629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667995050314 + 10667995050315.

It is an arithmetic number, because the mean of its divisors is an integer number (10667995050315).

Almost surely, 2^{21335990100629} is an apocalyptic number.

It is an amenable number.

21335990100629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335990100629 is an equidigital number, since it uses as much as digits as its factorization.

21335990100629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 50.

The spelling of 21335990100629 in words is "twenty-one trillion, three hundred thirty-five billion, nine hundred ninety million, one hundred thousand, six hundred twenty-nine".