123400123312420 has 48 divisors (see below), whose sum is σ = 264055865467968. Its totient is φ = 48429613584000.

The previous prime is 123400123312391. The next prime is 123400123312469. The reversal of 123400123312420 is 24213321004321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183109167 + ... + 183781846.

It is an arithmetic number, because the mean of its divisors is an integer number (5501163863916).

Almost surely, 2^{123400123312420} is an apocalyptic number.

123400123312420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123400123312420 is an abundant number, since it is smaller than the sum of its proper divisors (140655742155548).

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

123400123312420 is a wasteful number, since it uses less digits than its factorization.

123400123312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366891340 (or 366891338 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 123400123312420 its reverse (24213321004321), we get a palindrome (147613444316741).

The spelling of 123400123312420 in words is "one hundred twenty-three trillion, four hundred billion, one hundred twenty-three million, three hundred twelve thousand, four hundred twenty".