20213220311 has 2 divisors, whose sum is σ = 20213220312. Its totient is φ = 20213220310.

The previous prime is 20213220301. The next prime is 20213220323. The reversal of 20213220311 is 11302231202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20213220311 - 2¹⁰ = 20213219287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20213220311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213220301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106610155 + 10106610156.

It is an arithmetic number, because the mean of its divisors is an integer number (10106610156).

Almost surely, 2^20213220311 is an apocalyptic number.

20213220311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213220311 is an equidigital number, since it uses as much as digits as its factorization.

20213220311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20213220311 its reverse (11302231202), we get a palindrome (31515451513).

The spelling of 20213220311 in words is "twenty billion, two hundred thirteen million, two hundred twenty thousand, three hundred eleven".