21368686301 has 2 divisors, whose sum is σ = 21368686302. Its totient is φ = 21368686300.

The previous prime is 21368686289. The next prime is 21368686327. The reversal of 21368686301 is 10368686312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19074372100 + 2294314201 = 138110^2 + 47899^2 .

It is a cyclic number.

It is not a de Polignac number, because 21368686301 - 2¹⁰ = 21368685277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21368686351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10684343150 + 10684343151.

It is an arithmetic number, because the mean of its divisors is an integer number (10684343151).

Almost surely, 2^21368686301 is an apocalyptic number.

It is an amenable number.

21368686301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21368686301 is an equidigital number, since it uses as much as digits as its factorization.

21368686301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 21368686301 in words is "twenty-one billion, three hundred sixty-eight million, six hundred eighty-six thousand, three hundred one".