21370885069297 has 2 divisors, whose sum is σ = 21370885069298. Its totient is φ = 21370885069296.

The previous prime is 21370885069231. The next prime is 21370885069301. The reversal of 21370885069297 is 79296058807312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12887640484096 + 8483244585201 = 3589936^2 + 2912601^2 .

It is a cyclic number.

It is not a de Polignac number, because 21370885069297 - 2⁷ = 21370885069169 is a prime.

It is not a weakly prime, because it can be changed into another prime (21370885069397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10685442534648 + 10685442534649.

It is an arithmetic number, because the mean of its divisors is an integer number (10685442534649).

Almost surely, 2^{21370885069297} is an apocalyptic number.

It is an amenable number.

21370885069297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21370885069297 is an equidigital number, since it uses as much as digits as its factorization.

21370885069297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91445760, while the sum is 67.

The spelling of 21370885069297 in words is "twenty-one trillion, three hundred seventy billion, eight hundred eighty-five million, sixty-nine thousand, two hundred ninety-seven".