1243244423421 has 144 divisors (see below), whose sum is σ = 2495073922432. Its totient is φ = 580046987520.

The previous prime is 1243244423401. The next prime is 1243244423429.

1243244423421 is a `hidden beast` number, since 124 + 32 + 44 + 42 + 3 + 421 = 666.

1243244423421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1243244423421 - 2²² = 1243240229117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243244423429) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3497130 + ... + 3836196.

Almost surely, 2^{1243244423421} is an apocalyptic number.

1243244423421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243244423421 is an abundant number, since it is smaller than the sum of its proper divisors (1251829499011).

1243244423421 is a wasteful number, since it uses less digits than its factorization.

1243244423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339152 (or 339138 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

The spelling of 1243244423421 in words is "one trillion, two hundred forty-three billion, two hundred forty-four million, four hundred twenty-three thousand, four hundred twenty-one".