123021420434 has 32 divisors (see below), whose sum is σ = 209970627840. Its totient is φ = 53990558160.

The previous prime is 123021420413. The next prime is 123021420443. The reversal of 123021420434 is 434024120321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719594 + ... + 873989.

It is an arithmetic number, because the mean of its divisors is an integer number (6561582120).

Almost surely, 2^123021420434 is an apocalyptic number.

123021420434 is a deficient number, since it is larger than the sum of its proper divisors (86949207406).

123021420434 is a wasteful number, since it uses less digits than its factorization.

123021420434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593647 (or 1593625 counting only the distinct ones).

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

Adding to 123021420434 its reverse (434024120321), we get a palindrome (557045540755).

The spelling of 123021420434 in words is "one hundred twenty-three billion, twenty-one million, four hundred twenty thousand, four hundred thirty-four".