3121032221 has 8 divisors (see below), whose sum is σ = 3139224000. Its totient is φ = 3102865920.

The previous prime is 3121032179. The next prime is 3121032241. The reversal of 3121032221 is 1222301213.

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 3121032221 - 2¹⁸ = 3120770077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121032241) 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, 274826 + ... + 285956.

It is an arithmetic number, because the mean of its divisors is an integer number (392403000).

Almost surely, 2^3121032221 is an apocalyptic number.

It is an amenable number.

3121032221 is a deficient number, since it is larger than the sum of its proper divisors (18191779).

3121032221 is a wasteful number, since it uses less digits than its factorization.

3121032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3121032221 is about 55866.1992711156. The cubic root of 3121032221 is about 1461.3898413787.

Adding to 3121032221 its reverse (1222301213), we get a palindrome (4343333434).

The spelling of 3121032221 in words is "three billion, one hundred twenty-one million, thirty-two thousand, two hundred twenty-one".