21112300321087 has 2 divisors, whose sum is σ = 21112300321088. Its totient is φ = 21112300321086.

The previous prime is 21112300321031. The next prime is 21112300321127. The reversal of 21112300321087 is 78012300321112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112300321087 - 2³¹ = 21110152837439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112300321787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556150160543 + 10556150160544.

It is an arithmetic number, because the mean of its divisors is an integer number (10556150160544).

Almost surely, 2^{21112300321087} is an apocalyptic number.

21112300321087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112300321087 is an equidigital number, since it uses as much as digits as its factorization.

21112300321087 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 21112300321087 its reverse (78012300321112), we get a palindrome (99124600642199).

The spelling of 21112300321087 in words is "twenty-one trillion, one hundred twelve billion, three hundred million, three hundred twenty-one thousand, eighty-seven".