123220042242373 has 2 divisors, whose sum is σ = 123220042242374. Its totient is φ = 123220042242372.

The previous prime is 123220042242313. The next prime is 123220042242389. The reversal of 123220042242373 is 373242240022321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72504237263364 + 50715804979009 = 8514942^2 + 7121503^2 .

It is a cyclic number.

It is not a de Polignac number, because 123220042242373 - 2²¹ = 123220040145221 is a prime.

It is a super-2 number, since 2×123220042242373² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123220042242313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610021121186 + 61610021121187.

It is an arithmetic number, because the mean of its divisors is an integer number (61610021121187).

Almost surely, 2^{123220042242373} is an apocalyptic number.

It is an amenable number.

123220042242373 is a deficient number, since it is larger than the sum of its proper divisors (1).

123220042242373 is an equidigital number, since it uses as much as digits as its factorization.

123220042242373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 37.

Adding to 123220042242373 its reverse (373242240022321), we get a palindrome (496462282264694).

The spelling of 123220042242373 in words is "one hundred twenty-three trillion, two hundred twenty billion, forty-two million, two hundred forty-two thousand, three hundred seventy-three".