1310231041221 has 16 divisors (see below), whose sum is σ = 1750380754304. Its totient is φ = 871785725184.

The previous prime is 1310231041219. The next prime is 1310231041279. The reversal of 1310231041221 is 1221401320131.

It is not a de Polignac number, because 1310231041221 - 2¹ = 1310231041219 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 (1310231041421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3651945 + ... + 3994641.

It is an arithmetic number, because the mean of its divisors is an integer number (109398797144).

Almost surely, 2^{1310231041221} is an apocalyptic number.

It is an amenable number.

1310231041221 is a deficient number, since it is larger than the sum of its proper divisors (440149713083).

1310231041221 is a wasteful number, since it uses less digits than its factorization.

1310231041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345180.

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

Adding to 1310231041221 its reverse (1221401320131), we get a palindrome (2531632361352).

The spelling of 1310231041221 in words is "one trillion, three hundred ten billion, two hundred thirty-one million, forty-one thousand, two hundred twenty-one".