21203001003133 has 2 divisors, whose sum is σ = 21203001003134. Its totient is φ = 21203001003132.

The previous prime is 21203001003109. The next prime is 21203001003167. The reversal of 21203001003133 is 33130010030212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12891848232484 + 8311152770649 = 3590522^2 + 2882907^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203001003133 - 2¹³ = 21203000994941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21203001003133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203001003433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601500501566 + 10601500501567.

It is an arithmetic number, because the mean of its divisors is an integer number (10601500501567).

Almost surely, 2^{21203001003133} is an apocalyptic number.

It is an amenable number.

21203001003133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203001003133 is an equidigital number, since it uses as much as digits as its factorization.

21203001003133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21203001003133 its reverse (33130010030212), we get a palindrome (54333011033345).

The spelling of 21203001003133 in words is "twenty-one trillion, two hundred three billion, one million, three thousand, one hundred thirty-three".