21320313233111 has 2 divisors, whose sum is σ = 21320313233112. Its totient is φ = 21320313233110.

The previous prime is 21320313233099. The next prime is 21320313233171. The reversal of 21320313233111 is 11133231302312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320313233111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21320313233171) 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, 10660156616555 + 10660156616556.

It is an arithmetic number, because the mean of its divisors is an integer number (10660156616556).

Almost surely, 2^{21320313233111} is an apocalyptic number.

21320313233111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320313233111 is an equidigital number, since it uses as much as digits as its factorization.

21320313233111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21320313233111 its reverse (11133231302312), we get a palindrome (32453544535423).

The spelling of 21320313233111 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirteen million, two hundred thirty-three thousand, one hundred eleven".