123020420342 has 16 divisors (see below), whose sum is σ = 184966397952. Its totient is φ = 61365033000.

The previous prime is 123020420323. The next prime is 123020420363. The reversal of 123020420342 is 243024020321.

It is a super-2 number, since 2×123020420342² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3472217 + ... + 3507467.

It is an arithmetic number, because the mean of its divisors is an integer number (11560399872).

Almost surely, 2^123020420342 is an apocalyptic number.

123020420342 is a deficient number, since it is larger than the sum of its proper divisors (61945977610).

123020420342 is a wasteful number, since it uses less digits than its factorization.

123020420342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39323.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 123020420342 its reverse (243024020321), we get a palindrome (366044440663).

The spelling of 123020420342 in words is "one hundred twenty-three billion, twenty million, four hundred twenty thousand, three hundred forty-two".