20124403111 has 2 divisors, whose sum is σ = 20124403112. Its totient is φ = 20124403110.

The previous prime is 20124403099. The next prime is 20124403151. The reversal of 20124403111 is 11130442102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20124403111 - 2¹³ = 20124394919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20124403151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062201555 + 10062201556.

It is an arithmetic number, because the mean of its divisors is an integer number (10062201556).

Almost surely, 2^20124403111 is an apocalyptic number.

20124403111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124403111 is an equidigital number, since it uses as much as digits as its factorization.

20124403111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20124403111 its reverse (11130442102), we get a palindrome (31254845213).

The spelling of 20124403111 in words is "twenty billion, one hundred twenty-four million, four hundred three thousand, one hundred eleven".