20131201321 has 64 divisors (see below), whose sum is σ = 27544928256. Its totient is φ = 14229043200.

The previous prime is 20131201301. The next prime is 20131201327. The reversal of 20131201321 is 12310213102.

It is a cyclic number.

It is not a de Polignac number, because 20131201321 - 2⁵ = 20131201289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20131201295 and 20131201304.

It is not an unprimeable number, because it can be changed into a prime (20131201327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11482981 + ... + 11484733.

It is an arithmetic number, because the mean of its divisors is an integer number (430389504).

Almost surely, 2^20131201321 is an apocalyptic number.

It is an amenable number.

20131201321 is a deficient number, since it is larger than the sum of its proper divisors (7413726935).

20131201321 is a wasteful number, since it uses less digits than its factorization.

20131201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20131201321 its reverse (12310213102), we get a palindrome (32441414423).

The spelling of 20131201321 in words is "twenty billion, one hundred thirty-one million, two hundred one thousand, three hundred twenty-one".