123404121402 has 64 divisors (see below), whose sum is σ = 264324902400. Its totient is φ = 38291330880.

The previous prime is 123404121377. The next prime is 123404121413. The reversal of 123404121402 is 204121404321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28321008 + ... + 28325364.

It is an arithmetic number, because the mean of its divisors is an integer number (4130076600).

Almost surely, 2^123404121402 is an apocalyptic number.

123404121402 is an abundant number, since it is smaller than the sum of its proper divisors (140920780998).

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

123404121402 is a wasteful number, since it uses less digits than its factorization.

123404121402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 123404121402 its reverse (204121404321), we get a palindrome (327525525723).

The spelling of 123404121402 in words is "one hundred twenty-three billion, four hundred four million, one hundred twenty-one thousand, four hundred two".