405513202123 has 4 divisors (see below), whose sum is σ = 405525789400. Its totient is φ = 405500614848.

The previous prime is 405513202111. The next prime is 405513202153. The reversal of 405513202123 is 321202315504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405513202123 - 2¹³ = 405513193931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405513202091 and 405513202100.

It is not an unprimeable number, because it can be changed into a prime (405513202103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6245190 + ... + 6309787.

It is an arithmetic number, because the mean of its divisors is an integer number (101381447350).

Almost surely, 2^405513202123 is an apocalyptic number.

405513202123 is a deficient number, since it is larger than the sum of its proper divisors (12587277).

405513202123 is a wasteful number, since it uses less digits than its factorization.

405513202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12587276.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 405513202123 its reverse (321202315504), we get a palindrome (726715517627).

The spelling of 405513202123 in words is "four hundred five billion, five hundred thirteen million, two hundred two thousand, one hundred twenty-three".