321121220113 has 4 divisors (see below), whose sum is σ = 321808846320. Its totient is φ = 320433593908.

The previous prime is 321121220099. The next prime is 321121220137. The reversal of 321121220113 is 311022121123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321121220113 - 2⁵ = 321121220081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321121220713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343812403 + ... + 343813336.

It is an arithmetic number, because the mean of its divisors is an integer number (80452211580).

Almost surely, 2^321121220113 is an apocalyptic number.

It is an amenable number.

321121220113 is a deficient number, since it is larger than the sum of its proper divisors (687626207).

321121220113 is an equidigital number, since it uses as much as digits as its factorization.

321121220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687626206.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 321121220113 its reverse (311022121123), we get a palindrome (632143341236).

The spelling of 321121220113 in words is "three hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirteen".