321121011 has 16 divisors (see below), whose sum is σ = 443646720. Its totient is φ = 206475360.

The previous prime is 321120991. The next prime is 321121067. The reversal of 321121011 is 110121123.

It is not a de Polignac number, because 321121011 - 2¹⁴ = 321104627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321121091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7735 + ... + 26496.

It is an arithmetic number, because the mean of its divisors is an integer number (27727920).

Almost surely, 2^321121011 is an apocalyptic number.

321121011 is a deficient number, since it is larger than the sum of its proper divisors (122525709).

321121011 is a wasteful number, since it uses less digits than its factorization.

321121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34346.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 321121011 is about 17919.8496366460. The cubic root of 321121011 is about 684.7881569157.

Adding to 321121011 its reverse (110121123), we get a palindrome (431242134).

The spelling of 321121011 in words is "three hundred twenty-one million, one hundred twenty-one thousand, eleven".