21602350766099 has 2 divisors, whose sum is σ = 21602350766100. Its totient is φ = 21602350766098.

The previous prime is 21602350766089. The next prime is 21602350766221. The reversal of 21602350766099 is 99066705320612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21602350766099 - 2⁸ = 21602350765843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21602350766089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801175383049 + 10801175383050.

It is an arithmetic number, because the mean of its divisors is an integer number (10801175383050).

Almost surely, 2^{21602350766099} is an apocalyptic number.

21602350766099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602350766099 is an equidigital number, since it uses as much as digits as its factorization.

21602350766099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 21602350766099 in words is "twenty-one trillion, six hundred two billion, three hundred fifty million, seven hundred sixty-six thousand, ninety-nine".