21330223031087 has 2 divisors, whose sum is σ = 21330223031088. Its totient is φ = 21330223031086.

The previous prime is 21330223031041. The next prime is 21330223031101. The reversal of 21330223031087 is 78013032203312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330223031087 - 2¹⁴ = 21330223014703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330223031017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665111515543 + 10665111515544.

It is an arithmetic number, because the mean of its divisors is an integer number (10665111515544).

Almost surely, 2^{21330223031087} is an apocalyptic number.

21330223031087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330223031087 is an equidigital number, since it uses as much as digits as its factorization.

21330223031087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 21330223031087 its reverse (78013032203312), we get a palindrome (99343255234399).

The spelling of 21330223031087 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, eighty-seven".