131211232011 has 24 divisors (see below), whose sum is σ = 192784672080. Its totient is φ = 85981471296.

The previous prime is 131211231973. The next prime is 131211232013. The reversal of 131211232011 is 110232112131.

131211232011 is a `hidden beast` number, since 131 + 211 + 2 + 320 + 1 + 1 = 666.

It is not a de Polignac number, because 131211232011 - 2¹⁵ = 131211199243 is a prime.

It is a super-2 number, since 2×131211232011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131211232013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298656 + ... + 592973.

It is an arithmetic number, because the mean of its divisors is an integer number (8032694670).

Almost surely, 2^131211232011 is an apocalyptic number.

131211232011 is a deficient number, since it is larger than the sum of its proper divisors (61573440069).

131211232011 is a wasteful number, since it uses less digits than its factorization.

131211232011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891915 (or 891912 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131211232011 its reverse (110232112131), we get a palindrome (241443344142).

The spelling of 131211232011 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred thirty-two thousand, eleven".