321320011001331 has 4 divisors (see below), whose sum is σ = 428426681335112. Its totient is φ = 214213340667552.

The previous prime is 321320011001329. The next prime is 321320011001489. The reversal of 321320011001331 is 133100110023123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 321320011001331 - 2¹ = 321320011001329 is a prime.

It is a super-2 number, since 2×321320011001331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321320011001298 and 321320011001307.

It is not an unprimeable number, because it can be changed into a prime (321320011001131) 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, 53553335166886 + ... + 53553335166891.

It is an arithmetic number, because the mean of its divisors is an integer number (107106670333778).

Almost surely, 2^{321320011001331} is an apocalyptic number.

321320011001331 is a deficient number, since it is larger than the sum of its proper divisors (107106670333781).

321320011001331 is a wasteful number, since it uses less digits than its factorization.

321320011001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107106670333780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 321320011001331 its reverse (133100110023123), we get a palindrome (454420121024454).

The spelling of 321320011001331 in words is "three hundred twenty-one trillion, three hundred twenty billion, eleven million, one thousand, three hundred thirty-one".