3391020131221 has 8 divisors (see below), whose sum is σ = 3429167405400. Its totient is φ = 3352873877760.

The previous prime is 3391020131203. The next prime is 3391020131237. The reversal of 3391020131221 is 1221310201933.

It can be written as a sum of positive squares in 4 ways, for example, as 609163079121 + 2781857052100 = 780489^2 + 1667890^2 .

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 3391020131221 - 2¹⁷ = 3391020000149 is a prime.

It is a super-2 number, since 2×3391020131221² (a number of 26 digits) contains 22 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 3391020131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3391020171221) 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, 7875135 + ... + 8294563.

It is an arithmetic number, because the mean of its divisors is an integer number (428645925675).

Almost surely, 2^{3391020131221} is an apocalyptic number.

It is an amenable number.

3391020131221 is a deficient number, since it is larger than the sum of its proper divisors (38147274179).

3391020131221 is an equidigital number, since it uses as much as digits as its factorization.

3391020131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510359.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 3391020131221 in words is "three trillion, three hundred ninety-one billion, twenty million, one hundred thirty-one thousand, two hundred twenty-one".