12420233202421 has 16 divisors (see below), whose sum is σ = 13608977184000. Its totient is φ = 11241448288000.

The previous prime is 12420233202409. The next prime is 12420233202431.

12420233202421 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12420233202421 - 2⁵ = 12420233202389 is a prime.

It is a super-2 number, since 2×12420233202421² (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 12420233202421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420233202431) 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, 11714121 + ... + 12730321.

It is an arithmetic number, because the mean of its divisors is an integer number (850561074000).

Almost surely, 2^{12420233202421} is an apocalyptic number.

12420233202421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12420233202421 is a deficient number, since it is larger than the sum of its proper divisors (1188743981579).

12420233202421 is a wasteful number, since it uses less digits than its factorization.

12420233202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021100.

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 1242023 and 3202421, that added together give a palindrome (4444444).

The spelling of 12420233202421 in words is "twelve trillion, four hundred twenty billion, two hundred thirty-three million, two hundred two thousand, four hundred twenty-one".