12211210100123 has 4 divisors (see below), whose sum is σ = 12230937419160. Its totient is φ = 12191482781088.

The previous prime is 12211210100039. The next prime is 12211210100129. The reversal of 12211210100123 is 32100101211221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12211210100123 - 2²⁶ = 12211142991259 is a prime.

It is a super-2 number, since 2×12211210100123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211210100129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9863658590 + ... + 9863659827.

It is an arithmetic number, because the mean of its divisors is an integer number (3057734354790).

Almost surely, 2^{12211210100123} is an apocalyptic number.

12211210100123 is a deficient number, since it is larger than the sum of its proper divisors (19727319037).

12211210100123 is an equidigital number, since it uses as much as digits as its factorization.

12211210100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19727319036.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12211210100123 its reverse (32100101211221), we get a palindrome (44311311311344).

The spelling of 12211210100123 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, one hundred thousand, one hundred twenty-three".