20123211213 has 16 divisors (see below), whose sum is σ = 34071045760. Its totient is φ = 11498977728.

The previous prime is 20123211203. The next prime is 20123211217. The reversal of 20123211213 is 31211232102.

It is not a de Polignac number, because 20123211213 - 2⁵ = 20123211181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53235820 + ... + 53236197.

It is an arithmetic number, because the mean of its divisors is an integer number (2129440360).

Almost surely, 2^20123211213 is an apocalyptic number.

It is an amenable number.

20123211213 is a deficient number, since it is larger than the sum of its proper divisors (13947834547).

20123211213 is a wasteful number, since it uses less digits than its factorization.

20123211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106472033 (or 106472027 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20123211213 its reverse (31211232102), we get a palindrome (51334443315).

The spelling of 20123211213 in words is "twenty billion, one hundred twenty-three million, two hundred eleven thousand, two hundred thirteen".