131211200231 has 4 divisors (see below), whose sum is σ = 131219105472. Its totient is φ = 131203294992.

The previous prime is 131211200227. The next prime is 131211200327. The reversal of 131211200231 is 132002112131.

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 131211200231 - 2² = 131211200227 is a prime.

It is a super-2 number, since 2×131211200231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211200201) 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 3 ways as a sum of consecutive naturals, for example, 3927671 + ... + 3960936.

It is an arithmetic number, because the mean of its divisors is an integer number (32804776368).

Almost surely, 2^131211200231 is an apocalyptic number.

131211200231 is a deficient number, since it is larger than the sum of its proper divisors (7905241).

131211200231 is an equidigital number, since it uses as much as digits as its factorization.

131211200231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7905240.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131211200231 its reverse (132002112131), we get a palindrome (263213312362).

The spelling of 131211200231 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred thousand, two hundred thirty-one".