123012240001309 has 2 divisors, whose sum is σ = 123012240001310. Its totient is φ = 123012240001308.

The previous prime is 123012240001307. The next prime is 123012240001319. The reversal of 123012240001309 is 903100042210321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102774928013209 + 20237311988100 = 10137797^2 + 4498590^2 .

It is an emirp because it is prime and its reverse (903100042210321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123012240001309 - 2¹ = 123012240001307 is a prime.

It is a super-2 number, since 2×123012240001309² (a number of 29 digits) contains 22 as substring.

Together with 123012240001307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012240001307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506120000654 + 61506120000655.

It is an arithmetic number, because the mean of its divisors is an integer number (61506120000655).

Almost surely, 2^{123012240001309} is an apocalyptic number.

It is an amenable number.

123012240001309 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012240001309 is an equidigital number, since it uses as much as digits as its factorization.

123012240001309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 123012240001309 in words is "one hundred twenty-three trillion, twelve billion, two hundred forty million, one thousand, three hundred nine".