123420312444433 has 4 divisors (see below), whose sum is σ = 125748997584948. Its totient is φ = 121091627303920.

The previous prime is 123420312444349. The next prime is 123420312444437. The reversal of 123420312444433 is 334444213024321.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113042230865424 + 10378081579009 = 10632132^2 + 3221503^2 .

It is a cyclic number.

It is not a de Polignac number, because 123420312444433 - 2³³ = 123411722509841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123420312444437) 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, 1164342570178 + ... + 1164342570283.

It is an arithmetic number, because the mean of its divisors is an integer number (31437249396237).

Almost surely, 2^{123420312444433} is an apocalyptic number.

It is an amenable number.

123420312444433 is a deficient number, since it is larger than the sum of its proper divisors (2328685140515).

123420312444433 is an equidigital number, since it uses as much as digits as its factorization.

123420312444433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328685140514.

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 123420312444433 its reverse (334444213024321), we get a palindrome (457864525468754).

The spelling of 123420312444433 in words is "one hundred twenty-three trillion, four hundred twenty billion, three hundred twelve million, four hundred forty-four thousand, four hundred thirty-three".