131021132111 has 4 divisors (see below), whose sum is σ = 131024726112. Its totient is φ = 131017538112.

The previous prime is 131021132087. The next prime is 131021132113. The reversal of 131021132111 is 111231120131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131021132111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131021132111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021132113) 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, 1741751 + ... + 1815416.

It is an arithmetic number, because the mean of its divisors is an integer number (32756181528).

Almost surely, 2^131021132111 is an apocalyptic number.

131021132111 is a deficient number, since it is larger than the sum of its proper divisors (3594001).

131021132111 is an equidigital number, since it uses as much as digits as its factorization.

131021132111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594000.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 131021132111 its reverse (111231120131), we get a palindrome (242252252242).

The spelling of 131021132111 in words is "one hundred thirty-one billion, twenty-one million, one hundred thirty-two thousand, one hundred eleven".