20331212311 has 2 divisors, whose sum is σ = 20331212312. Its totient is φ = 20331212310.

The previous prime is 20331212269. The next prime is 20331212347. The reversal of 20331212311 is 11321213302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20331212311 - 2¹³ = 20331204119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331612311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165606155 + 10165606156.

It is an arithmetic number, because the mean of its divisors is an integer number (10165606156).

Almost surely, 2^20331212311 is an apocalyptic number.

20331212311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331212311 is an equidigital number, since it uses as much as digits as its factorization.

20331212311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20331212311 its reverse (11321213302), we get a palindrome (31652425613).

Subtracting from 20331212311 its reverse (11321213302), we obtain a palindrome (9009999009).

The spelling of 20331212311 in words is "twenty billion, three hundred thirty-one million, two hundred twelve thousand, three hundred eleven".