21011230013287 has 2 divisors, whose sum is σ = 21011230013288. Its totient is φ = 21011230013286.

The previous prime is 21011230013273. The next prime is 21011230013327. The reversal of 21011230013287 is 78231003211012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21011230013287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011230013087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505615006643 + 10505615006644.

It is an arithmetic number, because the mean of its divisors is an integer number (10505615006644).

Almost surely, 2^{21011230013287} is an apocalyptic number.

21011230013287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011230013287 is an equidigital number, since it uses as much as digits as its factorization.

21011230013287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 21011230013287 its reverse (78231003211012), we get a palindrome (99242233224299).

The spelling of 21011230013287 in words is "twenty-one trillion, eleven billion, two hundred thirty million, thirteen thousand, two hundred eighty-seven".