131838021611 has 4 divisors (see below), whose sum is σ = 132205258800. Its totient is φ = 131470784424.

The previous prime is 131838021599. The next prime is 131838021703. The reversal of 131838021611 is 116120838131.

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

It is a cyclic number.

It is not a de Polignac number, because 131838021611 - 2⁶ = 131838021547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131838021311) 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, 183618056 + ... + 183618773.

It is an arithmetic number, because the mean of its divisors is an integer number (33051314700).

Almost surely, 2^131838021611 is an apocalyptic number.

131838021611 is a deficient number, since it is larger than the sum of its proper divisors (367237189).

131838021611 is an equidigital number, since it uses as much as digits as its factorization.

131838021611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367237188.

The product of its (nonzero) digits is 6912, while the sum is 35.

Adding to 131838021611 its reverse (116120838131), we get a palindrome (247958859742).

The spelling of 131838021611 in words is "one hundred thirty-one billion, eight hundred thirty-eight million, twenty-one thousand, six hundred eleven".