131121213011 has 4 divisors (see below), whose sum is σ = 131360923272. Its totient is φ = 130881502752.

The previous prime is 131121213007. The next prime is 131121213023. The reversal of 131121213011 is 110312121131.

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 131121213011 - 2² = 131121213007 is a prime.

It is a super-2 number, since 2×131121213011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121213071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119854310 + ... + 119855403.

It is an arithmetic number, because the mean of its divisors is an integer number (32840230818).

Almost surely, 2^131121213011 is an apocalyptic number.

131121213011 is a deficient number, since it is larger than the sum of its proper divisors (239710261).

131121213011 is an equidigital number, since it uses as much as digits as its factorization.

131121213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239710260.

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

Adding to 131121213011 its reverse (110312121131), we get a palindrome (241433334142).

The spelling of 131121213011 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred thirteen thousand, eleven".