12421222212421 has 16 divisors (see below), whose sum is σ = 13869621900288. Its totient is φ = 11026176361200.

The previous prime is 12421222212403. The next prime is 12421222212463.

It is a happy number.

12421222212421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12421222212421 - 2⁵ = 12421222212389 is a prime.

It is a super-2 number, since 2×12421222212421² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12421222212421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421220212421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2242395 + ... + 5465416.

It is an arithmetic number, because the mean of its divisors is an integer number (866851368768).

Almost surely, 2^{12421222212421} is an apocalyptic number.

12421222212421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12421222212421 is a deficient number, since it is larger than the sum of its proper divisors (1448399687867).

12421222212421 is a wasteful number, since it uses less digits than its factorization.

12421222212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7711272.

The product of its digits is 4096, while the sum is 28.

It can be divided in two parts, 1242122 and 2212421, that added together give a palindrome (3454543).

The spelling of 12421222212421 in words is "twelve trillion, four hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, four hundred twenty-one".