123042134420 has 12 divisors (see below), whose sum is σ = 258388482324. Its totient is φ = 49216853760.

The previous prime is 123042134407. The next prime is 123042134497. The reversal of 123042134420 is 24431240321.

It can be written as a sum of positive squares in 2 ways, for example, as 93545445904 + 29496688516 = 305852^2 + 171746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123042134420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3076053341 + ... + 3076053380.

It is an arithmetic number, because the mean of its divisors is an integer number (21532373527).

Almost surely, 2^123042134420 is an apocalyptic number.

123042134420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123042134420 is an abundant number, since it is smaller than the sum of its proper divisors (135346347904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123042134420 is a wasteful number, since it uses less digits than its factorization.

123042134420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152106730 (or 6152106728 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 123042134420 its reverse (24431240321), we get a palindrome (147473374741).

The spelling of 123042134420 in words is "one hundred twenty-three billion, forty-two million, one hundred thirty-four thousand, four hundred twenty".