20331220411 has 2 divisors, whose sum is σ = 20331220412. Its totient is φ = 20331220410.

The previous prime is 20331220409. The next prime is 20331220421. The reversal of 20331220411 is 11402213302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20331220411 - 2¹ = 20331220409 is a prime.

Together with 20331220409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20331220421) 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, 10165610205 + 10165610206.

It is an arithmetic number, because the mean of its divisors is an integer number (10165610206).

Almost surely, 2^20331220411 is an apocalyptic number.

20331220411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331220411 is an equidigital number, since it uses as much as digits as its factorization.

20331220411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20331220411 its reverse (11402213302), we get a palindrome (31733433713).

The spelling of 20331220411 in words is "twenty billion, three hundred thirty-one million, two hundred twenty thousand, four hundred eleven".