210111213123 has 12 divisors (see below), whose sum is σ = 346850256688. Its totient is φ = 120063550320.

The previous prime is 210111213107. The next prime is 210111213161. The reversal of 210111213123 is 321312111012.

It is not a de Polignac number, because 210111213123 - 2⁴ = 210111213107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210111213096 and 210111213105.

It is not an unprimeable number, because it can be changed into a prime (210111213523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1667549248 + ... + 1667549373.

Almost surely, 2^210111213123 is an apocalyptic number.

210111213123 is a deficient number, since it is larger than the sum of its proper divisors (136739043565).

210111213123 is a wasteful number, since it uses less digits than its factorization.

210111213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335098634 (or 3335098631 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 210111213123 its reverse (321312111012), we get a palindrome (531423324135).

The spelling of 210111213123 in words is "two hundred ten billion, one hundred eleven million, two hundred thirteen thousand, one hundred twenty-three".