10423212421 has 4 divisors (see below), whose sum is σ = 10472611744. Its totient is φ = 10373813100.

The previous prime is 10423212389. The next prime is 10423212467. The reversal of 10423212421 is 12421232401.

10423212421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12421232401 = 89 ⋅139564409.

It is a cyclic number.

It is not a de Polignac number, because 10423212421 - 2⁵ = 10423212389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10423212392 and 10423212401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10423222421) 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, 24699345 + ... + 24699766.

It is an arithmetic number, because the mean of its divisors is an integer number (2618152936).

Almost surely, 2^10423212421 is an apocalyptic number.

It is an amenable number.

10423212421 is a deficient number, since it is larger than the sum of its proper divisors (49399323).

10423212421 is an equidigital number, since it uses as much as digits as its factorization.

10423212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49399322.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 10423212421 its reverse (12421232401), we get a palindrome (22844444822).

The spelling of 10423212421 in words is "ten billion, four hundred twenty-three million, two hundred twelve thousand, four hundred twenty-one".