20123313211 has 8 divisors (see below), whose sum is σ = 20166960464. Its totient is φ = 20079705600.

The previous prime is 20123313187. The next prime is 20123313271. The reversal of 20123313211 is 11231332102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123313211 - 2¹⁷ = 20123182139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123313271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149355 + ... + 1166731.

It is an arithmetic number, because the mean of its divisors is an integer number (2520870058).

Almost surely, 2^20123313211 is an apocalyptic number.

20123313211 is a deficient number, since it is larger than the sum of its proper divisors (43647253).

20123313211 is a wasteful number, since it uses less digits than its factorization.

20123313211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19821.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20123313211 its reverse (11231332102), we get a palindrome (31354645313).

The spelling of 20123313211 in words is "twenty billion, one hundred twenty-three million, three hundred thirteen thousand, two hundred eleven".