131221000310 has 16 divisors (see below), whose sum is σ = 241690773456. Its totient is φ = 51267739488.

The previous prime is 131221000301. The next prime is 131221000333. The reversal of 131221000310 is 13000122131.

It is a super-2 number, since 2×131221000310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152582129 + ... + 152582988.

It is an arithmetic number, because the mean of its divisors is an integer number (15105673341).

Almost surely, 2^131221000310 is an apocalyptic number.

131221000310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221000310 is a deficient number, since it is larger than the sum of its proper divisors (110469773146).

131221000310 is a wasteful number, since it uses less digits than its factorization.

131221000310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305165167.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 131221000310 its reverse (13000122131), we get a palindrome (144221122441).

The spelling of 131221000310 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred ten", and thus it is an aban number.