123412211245 has 12 divisors (see below), whose sum is σ = 154813506876. Its totient is φ = 94437168320.

The previous prime is 123412211227. The next prime is 123412211249. The reversal of 123412211245 is 542112214321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15735695364 + 107676515881 = 125442^2 + 328141^2 .

It is not a de Polignac number, because 123412211245 - 2²³ = 123403822637 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 (123412211249) 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, 23326696 + ... + 23331985.

It is an arithmetic number, because the mean of its divisors is an integer number (12901125573).

Almost surely, 2^123412211245 is an apocalyptic number.

It is an amenable number.

123412211245 is a deficient number, since it is larger than the sum of its proper divisors (31401295631).

123412211245 is an equidigital number, since it uses as much as digits as its factorization.

123412211245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46658732 (or 46658709 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

Adding to 123412211245 its reverse (542112214321), we get a palindrome (665524425566).

The spelling of 123412211245 in words is "one hundred twenty-three billion, four hundred twelve million, two hundred eleven thousand, two hundred forty-five".