42123123412 has 12 divisors (see below), whose sum is σ = 73721154976. Its totient is φ = 21059936280.

The previous prime is 42123123409. The next prime is 42123123437. The reversal of 42123123412 is 21432132124.

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, 347088 + ... + 452455.

Almost surely, 2^42123123412 is an apocalyptic number.

It is an amenable number.

42123123412 is a deficient number, since it is larger than the sum of its proper divisors (31598031564).

42123123412 is a wasteful number, since it uses less digits than its factorization.

42123123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812718 (or 812716 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 42123123412 its reverse (21432132124), we get a palindrome (63555255536).

The spelling of 42123123412 in words is "forty-two billion, one hundred twenty-three million, one hundred twenty-three thousand, four hundred twelve".