21442097008897 has 2 divisors, whose sum is σ = 21442097008898. Its totient is φ = 21442097008896.

The previous prime is 21442097008883. The next prime is 21442097008939. The reversal of 21442097008897 is 79880079024412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15516382759056 + 5925714249841 = 3939084^2 + 2434279^2 .

It is a cyclic number.

It is not a de Polignac number, because 21442097008897 - 2¹⁹ = 21442096484609 is a prime.

It is not a weakly prime, because it can be changed into another prime (21442097008807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721048504448 + 10721048504449.

It is an arithmetic number, because the mean of its divisors is an integer number (10721048504449).

Almost surely, 2^{21442097008897} is an apocalyptic number.

It is an amenable number.

21442097008897 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442097008897 is an equidigital number, since it uses as much as digits as its factorization.

21442097008897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 21442097008897 in words is "twenty-one trillion, four hundred forty-two billion, ninety-seven million, eight thousand, eight hundred ninety-seven".