321231111011 has 2 divisors, whose sum is σ = 321231111012. Its totient is φ = 321231111010.

The previous prime is 321231110999. The next prime is 321231111037. The reversal of 321231111011 is 110111132123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321231111011 - 2²² = 321226916707 is a prime.

It is a super-2 number, since 2×321231111011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321231111041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160615555505 + 160615555506.

It is an arithmetic number, because the mean of its divisors is an integer number (160615555506).

Almost surely, 2^321231111011 is an apocalyptic number.

321231111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

321231111011 is an equidigital number, since it uses as much as digits as its factorization.

321231111011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 321231111011 its reverse (110111132123), we get a palindrome (431342243134).

The spelling of 321231111011 in words is "three hundred twenty-one billion, two hundred thirty-one million, one hundred eleven thousand, eleven".