20424221011 has 2 divisors, whose sum is σ = 20424221012. Its totient is φ = 20424221010.

The previous prime is 20424220967. The next prime is 20424221023. The reversal of 20424221011 is 11012242402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424221011 - 2²⁵ = 20390666579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20424221011.

It is not a weakly prime, because it can be changed into another prime (20424221611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212110505 + 10212110506.

It is an arithmetic number, because the mean of its divisors is an integer number (10212110506).

Almost surely, 2^20424221011 is an apocalyptic number.

20424221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424221011 is an equidigital number, since it uses as much as digits as its factorization.

20424221011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20424221011 its reverse (11012242402), we get a palindrome (31436463413).

The spelling of 20424221011 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, eleven".