12421012421 has 8 divisors (see below), whose sum is σ = 12546269688. Its totient is φ = 12295800000.

The previous prime is 12421012381. The next prime is 12421012423.

12421012421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 11404104100 + 1016908321 = 106790^2 + 31889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12421012421 - 2¹⁴ = 12420996037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12421012393 and 12421012402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421012423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993791 + ... + 1006211.

It is an arithmetic number, because the mean of its divisors is an integer number (1568283711).

Almost surely, 2^12421012421 is an apocalyptic number.

It is an amenable number.

12421012421 is a deficient number, since it is larger than the sum of its proper divisors (125257267).

12421012421 is a wasteful number, since it uses less digits than its factorization.

12421012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22423.

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 124210 and 12421, that added together give a palindrome (136631).

The spelling of 12421012421 in words is "twelve billion, four hundred twenty-one million, twelve thousand, four hundred twenty-one".