1234403021423 has 24 divisors (see below), whose sum is σ = 1463684520144. Its totient is φ = 1034097229440.

The previous prime is 1234403021407. The next prime is 1234403021443. The reversal of 1234403021423 is 3241203044321.

It is not a de Polignac number, because 1234403021423 - 2⁴ = 1234403021407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234403021443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254915 + ... + 1591787.

It is an arithmetic number, because the mean of its divisors is an integer number (60986855006).

Almost surely, 2^{1234403021423} is an apocalyptic number.

1234403021423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1234403021423 is a deficient number, since it is larger than the sum of its proper divisors (229281498721).

1234403021423 is a wasteful number, since it uses less digits than its factorization.

1234403021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337495 (or 1337484 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 1234403021423 its reverse (3241203044321), we get a palindrome (4475606065744).

The spelling of 1234403021423 in words is "one trillion, two hundred thirty-four billion, four hundred three million, twenty-one thousand, four hundred twenty-three".