21320313233311 has 2 divisors, whose sum is σ = 21320313233312. Its totient is φ = 21320313233310.

The previous prime is 21320313233281. The next prime is 21320313233369. The reversal of 21320313233311 is 11333231302312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21320313233311 - 2¹⁹ = 21320312709023 is a prime.

It is a super-2 number, since 2×21320313233311² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21320313233311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21320313233111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660156616655 + 10660156616656.

It is an arithmetic number, because the mean of its divisors is an integer number (10660156616656).

Almost surely, 2^{21320313233311} is an apocalyptic number.

21320313233311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320313233311 is an equidigital number, since it uses as much as digits as its factorization.

21320313233311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21320313233311 its reverse (11333231302312), we get a palindrome (32653544535623).

The spelling of 21320313233311 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirteen million, two hundred thirty-three thousand, three hundred eleven".