123420012432 has 40 divisors (see below), whose sum is σ = 335615825760. Its totient is φ = 38974740480.

The previous prime is 123420012347. The next prime is 123420012437. The reversal of 123420012432 is 234210024321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (123420012437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67663569 + ... + 67665392.

It is an arithmetic number, because the mean of its divisors is an integer number (8390395644).

Almost surely, 2^123420012432 is an apocalyptic number.

123420012432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123420012432 is an abundant number, since it is smaller than the sum of its proper divisors (212195813328).

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

123420012432 is a wasteful number, since it uses less digits than its factorization.

123420012432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135328991 (or 135328985 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 123420012432 its reverse (234210024321), we get a palindrome (357630036753).

The spelling of 123420012432 in words is "one hundred twenty-three billion, four hundred twenty million, twelve thousand, four hundred thirty-two".