131221424104 has 16 divisors (see below), whose sum is σ = 246051623520. Its totient is φ = 65607657840.

The previous prime is 131221424101. The next prime is 131221424111. The reversal of 131221424104 is 401424122131.

It is not an unprimeable number, because it can be changed into a prime (131221424101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193732 + ... + 547699.

It is an arithmetic number, because the mean of its divisors is an integer number (15378226470).

Almost surely, 2^131221424104 is an apocalyptic number.

It is an amenable number.

131221424104 is a deficient number, since it is larger than the sum of its proper divisors (114830199416).

131221424104 is a wasteful number, since it uses less digits than its factorization.

131221424104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763560 (or 763556 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 131221424104 its reverse (401424122131), we get a palindrome (532645546235).

The spelling of 131221424104 in words is "one hundred thirty-one billion, two hundred twenty-one million, four hundred twenty-four thousand, one hundred four".