421230033012421 has 4 divisors (see below), whose sum is σ = 421349260310892. Its totient is φ = 421110805713952.

The previous prime is 421230033012403. The next prime is 421230033012431. The reversal of 421230033012421 is 124210330032124.

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 198979630968196 + 222250402044225 = 14106014^2 + 14908065^2 .

It is a cyclic number.

It is not a de Polignac number, because 421230033012421 - 2¹⁵ = 421230032979653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421230033012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421230033012401) 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, 59613643936 + ... + 59613651001.

It is an arithmetic number, because the mean of its divisors is an integer number (105337315077723).

Almost surely, 2^{421230033012421} is an apocalyptic number.

It is an amenable number.

421230033012421 is a deficient number, since it is larger than the sum of its proper divisors (119227298471).

421230033012421 is a wasteful number, since it uses less digits than its factorization.

421230033012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119227298470.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 421230033012421 its reverse (124210330032124), we get a palindrome (545440363044545).

The spelling of 421230033012421 in words is "four hundred twenty-one trillion, two hundred thirty billion, thirty-three million, twelve thousand, four hundred twenty-one".