13213032421 has 16 divisors (see below), whose sum is σ = 13993943040. Its totient is φ = 12440902320.

The previous prime is 13213032409. The next prime is 13213032431. The reversal of 13213032421 is 12423031231.

It is a cyclic number.

It is not a de Polignac number, because 13213032421 - 2¹⁷ = 13212901349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13213032392 and 13213032401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213032431) 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, 2310756 + ... + 2316466.

It is an arithmetic number, because the mean of its divisors is an integer number (874621440).

Almost surely, 2^13213032421 is an apocalyptic number.

It is an amenable number.

13213032421 is a deficient number, since it is larger than the sum of its proper divisors (780910619).

13213032421 is a wasteful number, since it uses less digits than its factorization.

13213032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 13213032421 its reverse (12423031231), we get a palindrome (25636063652).

The spelling of 13213032421 in words is "thirteen billion, two hundred thirteen million, thirty-two thousand, four hundred twenty-one".