20312220311 has 2 divisors, whose sum is σ = 20312220312. Its totient is φ = 20312220310.

The previous prime is 20312220307. The next prime is 20312220319. The reversal of 20312220311 is 11302221302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20312220311 - 2² = 20312220307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20312220311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156110155 + 10156110156.

It is an arithmetic number, because the mean of its divisors is an integer number (10156110156).

Almost surely, 2^20312220311 is an apocalyptic number.

20312220311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312220311 is an equidigital number, since it uses as much as digits as its factorization.

20312220311 is an evil number, because the sum of its binary digits is even.

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

Adding to 20312220311 its reverse (11302221302), we get a palindrome (31614441613).

Subtracting from 20312220311 its reverse (11302221302), we obtain a palindrome (9009999009).

The spelling of 20312220311 in words is "twenty billion, three hundred twelve million, two hundred twenty thousand, three hundred eleven".