131221440310 has 32 divisors (see below), whose sum is σ = 240233270400. Its totient is φ = 51597786240.

The previous prime is 131221440277. The next prime is 131221440323. The reversal of 131221440310 is 13044122131.

It is a super-2 number, since 2×131221440310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 181761 + ... + 543580.

It is an arithmetic number, because the mean of its divisors is an integer number (7507289700).

Almost surely, 2^131221440310 is an apocalyptic number.

131221440310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221440310 is a deficient number, since it is larger than the sum of its proper divisors (109011830090).

131221440310 is a wasteful number, since it uses less digits than its factorization.

131221440310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725656.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 131221440310 its reverse (13044122131), we get a palindrome (144265562441).

The spelling of 131221440310 in words is "one hundred thirty-one billion, two hundred twenty-one million, four hundred forty thousand, three hundred ten".