131221030011 has 8 divisors (see below), whose sum is σ = 175084331520. Its totient is φ = 87419207592.

The previous prime is 131221030009. The next prime is 131221030027. The reversal of 131221030011 is 110030122131.

It is a happy number.

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

It is not a de Polignac number, because 131221030011 - 2¹ = 131221030009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131221030001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15364791 + ... + 15373328.

It is an arithmetic number, because the mean of its divisors is an integer number (21885541440).

Almost surely, 2^131221030011 is an apocalyptic number.

131221030011 is a deficient number, since it is larger than the sum of its proper divisors (43863301509).

131221030011 is a wasteful number, since it uses less digits than its factorization.

131221030011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30739545.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131221030011 its reverse (110030122131), we get a palindrome (241251152142).

The spelling of 131221030011 in words is "one hundred thirty-one billion, two hundred twenty-one million, thirty thousand, eleven".