131111333021 has 16 divisors (see below), whose sum is σ = 136472515200. Its totient is φ = 125806769088.

The previous prime is 131111332999. The next prime is 131111333029. The reversal of 131111333021 is 120333111131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131111333021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131111332984 and 131111333002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111333029) by changing a digit.

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, 18654710 + ... + 18661736.

It is an arithmetic number, because the mean of its divisors is an integer number (8529532200).

Almost surely, 2^131111333021 is an apocalyptic number.

It is an amenable number.

131111333021 is a deficient number, since it is larger than the sum of its proper divisors (5361182179).

131111333021 is a wasteful number, since it uses less digits than its factorization.

131111333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10948.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 131111333021 its reverse (120333111131), we get a palindrome (251444444152).

The spelling of 131111333021 in words is "one hundred thirty-one billion, one hundred eleven million, three hundred thirty-three thousand, twenty-one".