321020121 has 8 divisors (see below), whose sum is σ = 435281760. Its totient is φ = 210385952.

The previous prime is 321020101. The next prime is 321020137. The reversal of 321020121 is 121020123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321020121 - 2⁶ = 321020057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321020097 and 321020106.

It is not an unprimeable number, because it can be changed into a prime (321020101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906660 + ... + 907013.

It is an arithmetic number, because the mean of its divisors is an integer number (54410220).

Almost surely, 2^321020121 is an apocalyptic number.

It is an amenable number.

321020121 is a deficient number, since it is larger than the sum of its proper divisors (114261639).

321020121 is a wasteful number, since it uses less digits than its factorization.

321020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813735.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 321020121 is about 17917.0343807227. The cubic root of 321020121 is about 684.7164336800.

Adding to 321020121 its reverse (121020123), we get a palindrome (442040244).

The spelling of 321020121 in words is "three hundred twenty-one million, twenty thousand, one hundred twenty-one".