123311440297 has 4 divisors (see below), whose sum is σ = 125638071300. Its totient is φ = 120984809296.

The previous prime is 123311440283. The next prime is 123311440309. The reversal of 123311440297 is 792044113321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 792044113321 = 22147 ⋅35763043.

It can be written as a sum of positive squares in 2 ways, for example, as 93320474256 + 29990966041 = 305484^2 + 173179^2 .

It is a cyclic number.

It is not a de Polignac number, because 123311440297 - 2¹¹ = 123311438249 is a prime.

It is a super-2 number, since 2×123311440297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123311440277) 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, 1163315422 + ... + 1163315527.

It is an arithmetic number, because the mean of its divisors is an integer number (31409517825).

Almost surely, 2^123311440297 is an apocalyptic number.

It is an amenable number.

123311440297 is a deficient number, since it is larger than the sum of its proper divisors (2326631003).

123311440297 is an equidigital number, since it uses as much as digits as its factorization.

123311440297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326631002.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 123311440297 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred forty thousand, two hundred ninety-seven".