3231121120221 has 4 divisors (see below), whose sum is σ = 4308161493632. Its totient is φ = 2154080746812.

The previous prime is 3231121120211. The next prime is 3231121120231. The reversal of 3231121120221 is 1220211211323.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3231121120211) and next prime (3231121120231).

It is not a de Polignac number, because 3231121120221 - 2⁷ = 3231121120093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231121120211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538520186701 + ... + 538520186706.

It is an arithmetic number, because the mean of its divisors is an integer number (1077040373408).

Almost surely, 2^{3231121120221} is an apocalyptic number.

It is an amenable number.

3231121120221 is a deficient number, since it is larger than the sum of its proper divisors (1077040373411).

3231121120221 is a wasteful number, since it uses less digits than its factorization.

3231121120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077040373410.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 3231121120221 its reverse (1220211211323), we get a palindrome (4451332331544).

The spelling of 3231121120221 in words is "three trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".