21201422341097 has 2 divisors, whose sum is σ = 21201422341098. Its totient is φ = 21201422341096.

The previous prime is 21201422341091. The next prime is 21201422341133. The reversal of 21201422341097 is 79014322410212.

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., 14927744958736 + 6273677382361 = 3863644^2 + 2504731^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201422341097 - 2²⁴ = 21201405563881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21201422341097.

It is not a weakly prime, because it can be changed into another prime (21201422341091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600711170548 + 10600711170549.

It is an arithmetic number, because the mean of its divisors is an integer number (10600711170549).

Almost surely, 2^{21201422341097} is an apocalyptic number.

It is an amenable number.

21201422341097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201422341097 is an equidigital number, since it uses as much as digits as its factorization.

21201422341097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 21201422341097 in words is "twenty-one trillion, two hundred one billion, four hundred twenty-two million, three hundred forty-one thousand, ninety-seven".