213043404123 has 40 divisors (see below), whose sum is σ = 362276741376. Its totient is φ = 123503410800.

The previous prime is 213043404097. The next prime is 213043404127. The reversal of 213043404123 is 321404340312.

213043404123 is a `hidden beast` number, since 2 + 1 + 304 + 340 + 4 + 12 + 3 = 666.

213043404123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213043404123 - 2⁶ = 213043404059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213043404127) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 5177463 + ... + 5218448.

Almost surely, 2^213043404123 is an apocalyptic number.

213043404123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213043404123 is a deficient number, since it is larger than the sum of its proper divisors (149233337253).

213043404123 is a wasteful number, since it uses less digits than its factorization.

213043404123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395957 (or 10395948 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 213043404123 its reverse (321404340312), we get a palindrome (534447744435).

The spelling of 213043404123 in words is "two hundred thirteen billion, forty-three million, four hundred four thousand, one hundred twenty-three".