131021120403 has 32 divisors (see below), whose sum is σ = 201640320000. Its totient is φ = 84016699200.

The previous prime is 131021120323. The next prime is 131021120413. The reversal of 131021120403 is 304021120131.

131021120403 is a `hidden beast` number, since 1 + 31 + 0 + 211 + 20 + 403 = 666.

It is not a de Polignac number, because 131021120403 - 2⁹ = 131021119891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131021120413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754903 + ... + 912096.

It is an arithmetic number, because the mean of its divisors is an integer number (6301260000).

Almost surely, 2^131021120403 is an apocalyptic number.

131021120403 is a deficient number, since it is larger than the sum of its proper divisors (70619199597).

131021120403 is a wasteful number, since it uses less digits than its factorization.

131021120403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667120 (or 1667114 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131021120403 its reverse (304021120131), we get a palindrome (435042240534).

The spelling of 131021120403 in words is "one hundred thirty-one billion, twenty-one million, one hundred twenty thousand, four hundred three".