21394885301 has 2 divisors, whose sum is σ = 21394885302. Its totient is φ = 21394885300.

The previous prime is 21394885277. The next prime is 21394885327. The reversal of 21394885301 is 10358849312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16473722500 + 4921162801 = 128350^2 + 70151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21394885301 is a prime.

It is a super-3 number, since 3×21394885301³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21394885601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10697442650 + 10697442651.

It is an arithmetic number, because the mean of its divisors is an integer number (10697442651).

Almost surely, 2^21394885301 is an apocalyptic number.

It is an amenable number.

21394885301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21394885301 is an equidigital number, since it uses as much as digits as its factorization.

21394885301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 21394885301 in words is "twenty-one billion, three hundred ninety-four million, eight hundred eighty-five thousand, three hundred one".