21203103001369 has 2 divisors, whose sum is σ = 21203103001370. Its totient is φ = 21203103001368.

The previous prime is 21203103001313. The next prime is 21203103001499. The reversal of 21203103001369 is 96310030130212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17066813440000 + 4136289561369 = 4131200^2 + 2033787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203103001369 is a prime.

It is a super-2 number, since 2×21203103001369² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21203103001369.

It is not a weakly prime, because it can be changed into another prime (21203103001169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601551500684 + 10601551500685.

It is an arithmetic number, because the mean of its divisors is an integer number (10601551500685).

Almost surely, 2^{21203103001369} is an apocalyptic number.

It is an amenable number.

21203103001369 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203103001369 is an equidigital number, since it uses as much as digits as its factorization.

21203103001369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 21203103001369 in words is "twenty-one trillion, two hundred three billion, one hundred three million, one thousand, three hundred sixty-nine".