321120221013 has 12 divisors (see below), whose sum is σ = 481019590688. Its totient is φ = 214080147180.

The previous prime is 321120220987. The next prime is 321120221057. The reversal of 321120221013 is 310122021123.

321120221013 is a `hidden beast` number, since 321 + 120 + 2 + 210 + 13 = 666.

It is not a de Polignac number, because 321120221013 - 2⁹ = 321120220501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120221713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660740953 + ... + 660741438.

Almost surely, 2^321120221013 is an apocalyptic number.

It is an amenable number.

321120221013 is a deficient number, since it is larger than the sum of its proper divisors (159899369675).

321120221013 is an equidigital number, since it uses as much as digits as its factorization.

321120221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321482406 (or 1321482394 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321120221013 its reverse (310122021123), we get a palindrome (631242242136).

The spelling of 321120221013 in words is "three hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, thirteen".