21522631699193 has 2 divisors, whose sum is σ = 21522631699194. Its totient is φ = 21522631699192.

The previous prime is 21522631699171. The next prime is 21522631699271. The reversal of 21522631699193 is 39199613622512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13123317702544 + 8399313996649 = 3622612^2 + 2898157^2 .

It is a cyclic number.

It is not a de Polignac number, because 21522631699193 - 2¹⁸ = 21522631437049 is a prime.

It is not a weakly prime, because it can be changed into another prime (21522631692193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761315849596 + 10761315849597.

It is an arithmetic number, because the mean of its divisors is an integer number (10761315849597).

Almost surely, 2^{21522631699193} is an apocalyptic number.

It is an amenable number.

21522631699193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522631699193 is an equidigital number, since it uses as much as digits as its factorization.

21522631699193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9447840, while the sum is 59.

The spelling of 21522631699193 in words is "twenty-one trillion, five hundred twenty-two billion, six hundred thirty-one million, six hundred ninety-nine thousand, one hundred ninety-three".