20123102211 has 16 divisors (see below), whose sum is σ = 27951073920. Its totient is φ = 12866358080.

The previous prime is 20123102189. The next prime is 20123102239. The reversal of 20123102211 is 11220132102.

It is a cyclic number.

It is not a de Polignac number, because 20123102211 - 2²⁷ = 19988884483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20123102611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1379205 + ... + 1393718.

It is an arithmetic number, because the mean of its divisors is an integer number (1746942120).

Almost surely, 2^20123102211 is an apocalyptic number.

20123102211 is a deficient number, since it is larger than the sum of its proper divisors (7827971709).

20123102211 is a wasteful number, since it uses less digits than its factorization.

20123102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773026.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20123102211 its reverse (11220132102), we get a palindrome (31343234313).

The spelling of 20123102211 in words is "twenty billion, one hundred twenty-three million, one hundred two thousand, two hundred eleven".