1310110231221 has 24 divisors (see below), whose sum is σ = 2064573519840. Its totient is φ = 793945663200.

The previous prime is 1310110231219. The next prime is 1310110231231. The reversal of 1310110231221 is 1221320110131.

1310110231221 is a `hidden beast` number, since 1 + 310 + 1 + 102 + 31 + 221 = 666.

It is not a de Polignac number, because 1310110231221 - 2¹ = 1310110231219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1310110231194 and 1310110231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310110231231) 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 23 ways as a sum of consecutive naturals, for example, 817975 + ... + 1813643.

It is an arithmetic number, because the mean of its divisors is an integer number (86023896660).

Almost surely, 2^{1310110231221} is an apocalyptic number.

1310110231221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1310110231221 is a deficient number, since it is larger than the sum of its proper divisors (754463288619).

1310110231221 is a wasteful number, since it uses less digits than its factorization.

1310110231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008977 (or 1008974 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1310110231221 its reverse (1221320110131), we get a palindrome (2531430341352).

The spelling of 1310110231221 in words is "one trillion, three hundred ten billion, one hundred ten million, two hundred thirty-one thousand, two hundred twenty-one".