420213123 has 32 divisors (see below), whose sum is σ = 719089920. Its totient is φ = 239690880.

The previous prime is 420213121. The next prime is 420213127. The reversal of 420213123 is 321312024.

It is not a de Polignac number, because 420213123 - 2¹ = 420213121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420213096 and 420213105.

It is not an unprimeable number, because it can be changed into a prime (420213121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36565 + ... + 46662.

It is an arithmetic number, because the mean of its divisors is an integer number (22471560).

Almost surely, 2^420213123 is an apocalyptic number.

420213123 is a deficient number, since it is larger than the sum of its proper divisors (298876797).

420213123 is a wasteful number, since it uses less digits than its factorization.

420213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83264 (or 83258 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 420213123 is about 20499.1005412433. The cubic root of 420213123 is about 749.0138880124.

Adding to 420213123 its reverse (321312024), we get a palindrome (741525147).

The spelling of 420213123 in words is "four hundred twenty million, two hundred thirteen thousand, one hundred twenty-three".