131220011 has 8 divisors (see below), whose sum is σ = 141541344. Its totient is φ = 120931200.

The previous prime is 131219989. The next prime is 131220017. The reversal of 131220011 is 110022131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131220011 - 2¹⁰ = 131218987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131219974 and 131220001.

It is not an unprimeable number, because it can be changed into a prime (131220017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611 + ... + 16211.

It is an arithmetic number, because the mean of its divisors is an integer number (17692668).

Almost surely, 2^131220011 is an apocalyptic number.

131220011 is a deficient number, since it is larger than the sum of its proper divisors (10321333).

131220011 is a wasteful number, since it uses less digits than its factorization.

131220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16261.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 131220011 is about 11455.1303353563. The cubic root of 131220011 is about 508.1594697952.

Adding to 131220011 its reverse (110022131), we get a palindrome (241242142).

The spelling of 131220011 in words is "one hundred thirty-one million, two hundred twenty thousand, eleven".