2124431031421 has 16 divisors (see below), whose sum is σ = 2195489491200. Its totient is φ = 2054481504768.

The previous prime is 2124431031413. The next prime is 2124431031473. The reversal of 2124431031421 is 1241301344212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2124431031421 - 2³ = 2124431031413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2124431031421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124431061421) 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, 6057946 + ... + 6399028.

It is an arithmetic number, because the mean of its divisors is an integer number (137218093200).

Almost surely, 2^{2124431031421} is an apocalyptic number.

It is an amenable number.

2124431031421 is a deficient number, since it is larger than the sum of its proper divisors (71058459779).

2124431031421 is a wasteful number, since it uses less digits than its factorization.

2124431031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342708.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 2124431031421 its reverse (1241301344212), we get a palindrome (3365732375633).

The spelling of 2124431031421 in words is "two trillion, one hundred twenty-four billion, four hundred thirty-one million, thirty-one thousand, four hundred twenty-one".