20123211103 has 2 divisors, whose sum is σ = 20123211104. Its totient is φ = 20123211102.

The previous prime is 20123211091. The next prime is 20123211181. The reversal of 20123211103 is 30111232102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20123211103 - 2¹⁷ = 20123080031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123211203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061605551 + 10061605552.

It is an arithmetic number, because the mean of its divisors is an integer number (10061605552).

Almost surely, 2^20123211103 is an apocalyptic number.

20123211103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123211103 is an equidigital number, since it uses as much as digits as its factorization.

20123211103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20123211103 its reverse (30111232102), we get a palindrome (50234443205).

The spelling of 20123211103 in words is "twenty billion, one hundred twenty-three million, two hundred eleven thousand, one hundred three".