12434433443421 has 16 divisors (see below), whose sum is σ = 18102162382848. Its totient is φ = 7529472878000.

The previous prime is 12434433443381. The next prime is 12434433443489.

12434433443421 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12434433443421 - 2¹¹ = 12434433441373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12434433442421) 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, 163646211 + ... + 163722176.

It is an arithmetic number, because the mean of its divisors is an integer number (1131385148928).

Almost surely, 2^{12434433443421} is an apocalyptic number.

12434433443421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12434433443421 is a deficient number, since it is larger than the sum of its proper divisors (5667728939427).

12434433443421 is a wasteful number, since it uses less digits than its factorization.

12434433443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327369552.

The product of its digits is 1327104, while the sum is 42.

It can be divided in two parts, 1243443 and 3443421, that added together give a palindrome (4686864).

The spelling of 12434433443421 in words is "twelve trillion, four hundred thirty-four billion, four hundred thirty-three million, four hundred forty-three thousand, four hundred twenty-one".