12211220123 has 2 divisors, whose sum is σ = 12211220124. Its totient is φ = 12211220122.

The previous prime is 12211220113. The next prime is 12211220159. The reversal of 12211220123 is 32102211221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211220123 - 2¹² = 12211216027 is a prime.

It is a super-2 number, since 2×12211220123² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12211220113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105610061 + 6105610062.

It is an arithmetic number, because the mean of its divisors is an integer number (6105610062).

Almost surely, 2^12211220123 is an apocalyptic number.

12211220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211220123 is an equidigital number, since it uses as much as digits as its factorization.

12211220123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12211220123 its reverse (32102211221), we get a palindrome (44313431344).

The spelling of 12211220123 in words is "twelve billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-three".