421313123 has 24 divisors (see below), whose sum is σ = 546061824. Its totient is φ = 321291600.

The previous prime is 421313107. The next prime is 421313141. The reversal of 421313123 is 321313124.

It is not a de Polignac number, because 421313123 - 2⁴ = 421313107 is a prime.

It is a super-2 number, since 2×421313123² = 355009495224026258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421313095 and 421313104.

It is not an unprimeable number, because it can be changed into a prime (421315123) 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, 17018 + ... + 33648.

It is an arithmetic number, because the mean of its divisors is an integer number (22752576).

Almost surely, 2^421313123 is an apocalyptic number.

421313123 is a deficient number, since it is larger than the sum of its proper divisors (124748701).

421313123 is a wasteful number, since it uses less digits than its factorization.

421313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16703 (or 16696 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 421313123 is about 20525.9134510501. The cubic root of 421313123 is about 749.6668879222. Note that the first 3 decimals are identical.

Adding to 421313123 its reverse (321313124), we get a palindrome (742626247).

Subtracting from 421313123 its reverse (321313124), we obtain a palindrome (99999999).

It can be divided in two parts, 42131 and 3123, that added together give a palindrome (45254).

The spelling of 421313123 in words is "four hundred twenty-one million, three hundred thirteen thousand, one hundred twenty-three".