3231121220021 has 8 divisors (see below), whose sum is σ = 3247050681600. Its totient is φ = 3215197571040.

The previous prime is 3231121220003. The next prime is 3231121220053. The reversal of 3231121220021 is 1200221211323.

3231121220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3231121220021 - 2⁶ = 3231121219957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3231121219975 and 3231121220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231121220071) 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, 336536 + ... + 2564273.

It is an arithmetic number, because the mean of its divisors is an integer number (405881335200).

Almost surely, 2^{3231121220021} is an apocalyptic number.

It is an amenable number.

3231121220021 is a deficient number, since it is larger than the sum of its proper divisors (15929461579).

3231121220021 is a wasteful number, since it uses less digits than its factorization.

3231121220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906299.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 3231121220021 its reverse (1200221211323), we get a palindrome (4431342431344).

The spelling of 3231121220021 in words is "three trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".