321122121 has 16 divisors (see below), whose sum is σ = 432230400. Its totient is φ = 212058000.

The previous prime is 321122101. The next prime is 321122143. The reversal of 321122121 is 121221123.

It is not a de Polignac number, because 321122121 - 2⁹ = 321121609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321122121.

It is not an unprimeable number, because it can be changed into a prime (321122101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148776 + ... + 150918.

It is an arithmetic number, because the mean of its divisors is an integer number (27014400).

Almost surely, 2^321122121 is an apocalyptic number.

It is an amenable number.

321122121 is a deficient number, since it is larger than the sum of its proper divisors (111108279).

321122121 is a wasteful number, since it uses less digits than its factorization.

321122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596.

The product of its digits is 48, while the sum is 15.

The square root of 321122121 is about 17919.8806078612. The cubic root of 321122121 is about 684.7889459370.

Adding to 321122121 its reverse (121221123), we get a palindrome (442343244).

The spelling of 321122121 in words is "three hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".