3131244023221 has 8 divisors (see below), whose sum is σ = 3204148923360. Its totient is φ = 3058342999152.

The previous prime is 3131244023197. The next prime is 3131244023231. The reversal of 3131244023221 is 1223204421313.

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 3131244023221 - 2²¹ = 3131241926069 is a prime.

It is a super-4 number, since 4×3131244023221⁴ (a number of 51 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131244023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131244023231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698490 + ... + 2598148.

It is an arithmetic number, because the mean of its divisors is an integer number (400518615420).

Almost surely, 2^{3131244023221} is an apocalyptic number.

It is an amenable number.

3131244023221 is a deficient number, since it is larger than the sum of its proper divisors (72904900139).

3131244023221 is a wasteful number, since it uses less digits than its factorization.

3131244023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938035.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 3131244023221 its reverse (1223204421313), we get a palindrome (4354448444534).

The spelling of 3131244023221 in words is "three trillion, one hundred thirty-one billion, two hundred forty-four million, twenty-three thousand, two hundred twenty-one".