11431202321 has 32 divisors (see below), whose sum is σ = 14499406080. Its totient is φ = 8754048000.

The previous prime is 11431202297. The next prime is 11431202323. The reversal of 11431202321 is 12320213411.

It is a cyclic number.

It is not a de Polignac number, because 11431202321 - 2¹⁰ = 11431201297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11431202293 and 11431202302.

It is not an unprimeable number, because it can be changed into a prime (11431202323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1060085 + ... + 1070813.

It is an arithmetic number, because the mean of its divisors is an integer number (453106440).

Almost surely, 2^11431202321 is an apocalyptic number.

11431202321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11431202321 is a deficient number, since it is larger than the sum of its proper divisors (3068203759).

11431202321 is a wasteful number, since it uses less digits than its factorization.

11431202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11431202321 its reverse (12320213411), we get a palindrome (23751415732).

The spelling of 11431202321 in words is "eleven billion, four hundred thirty-one million, two hundred two thousand, three hundred twenty-one".