421234330133 has 4 divisors (see below), whose sum is σ = 423669210828. Its totient is φ = 418799449440.

The previous prime is 421234330129. The next prime is 421234330147. The reversal of 421234330133 is 331033432124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 258411588964 + 162822741169 = 508342^2 + 403513^2 .

It is a cyclic number.

It is not a de Polignac number, because 421234330133 - 2² = 421234330129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421234330096 and 421234330105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421234360133) 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, 1217440088 + ... + 1217440433.

It is an arithmetic number, because the mean of its divisors is an integer number (105917302707).

Almost surely, 2^421234330133 is an apocalyptic number.

It is an amenable number.

421234330133 is a deficient number, since it is larger than the sum of its proper divisors (2434880695).

421234330133 is a wasteful number, since it uses less digits than its factorization.

421234330133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434880694.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 421234330133 its reverse (331033432124), we get a palindrome (752267762257).

The spelling of 421234330133 in words is "four hundred twenty-one billion, two hundred thirty-four million, three hundred thirty thousand, one hundred thirty-three".