21013311133103 has 2 divisors, whose sum is σ = 21013311133104. Its totient is φ = 21013311133102.

The previous prime is 21013311133081. The next prime is 21013311133159. The reversal of 21013311133103 is 30133111331012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21013311133103 - 2²⁶ = 21013244024239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013311133303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506655566551 + 10506655566552.

It is an arithmetic number, because the mean of its divisors is an integer number (10506655566552).

Almost surely, 2^{21013311133103} is an apocalyptic number.

21013311133103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013311133103 is an equidigital number, since it uses as much as digits as its factorization.

21013311133103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 21013311133103 its reverse (30133111331012), we get a palindrome (51146422464115).

The spelling of 21013311133103 in words is "twenty-one trillion, thirteen billion, three hundred eleven million, one hundred thirty-three thousand, one hundred three".