131221445250120 has 64 divisors (see below), whose sum is σ = 399208903885440. Its totient is φ = 34499534899200.

The previous prime is 131221445250097. The next prime is 131221445250131. The reversal of 131221445250120 is 21052544122131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7700780521 + ... + 7700797560.

It is an arithmetic number, because the mean of its divisors is an integer number (6237639123210).

Almost surely, 2^{131221445250120} is an apocalyptic number.

131221445250120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131221445250120 is an abundant number, since it is smaller than the sum of its proper divisors (267987458635320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131221445250120 is a wasteful number, since it uses less digits than its factorization.

131221445250120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401578166 (or 15401578162 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 131221445250120 its reverse (21052544122131), we get a palindrome (152273989372251).

The spelling of 131221445250120 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, four hundred forty-five million, two hundred fifty thousand, one hundred twenty".