20011223411 has 2 divisors, whose sum is σ = 20011223412. Its totient is φ = 20011223410.

The previous prime is 20011223399. The next prime is 20011223443. The reversal of 20011223411 is 11432211002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011223411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011223411.

It is not a weakly prime, because it can be changed into another prime (20011223711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005611705 + 10005611706.

It is an arithmetic number, because the mean of its divisors is an integer number (10005611706).

Almost surely, 2^20011223411 is an apocalyptic number.

20011223411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011223411 is an equidigital number, since it uses as much as digits as its factorization.

20011223411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20011223411 its reverse (11432211002), we get a palindrome (31443434413).

The spelling of 20011223411 in words is "twenty billion, eleven million, two hundred twenty-three thousand, four hundred eleven".