131022221211 has 48 divisors (see below), whose sum is σ = 229081881600. Its totient is φ = 70444733184.

The previous prime is 131022221207. The next prime is 131022221219. The reversal of 131022221211 is 112122220131.

It is not a de Polignac number, because 131022221211 - 2² = 131022221207 is a prime.

It is a super-4 number, since 4×131022221211⁴ (a number of 46 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (131022221219) 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 47 ways as a sum of consecutive naturals, for example, 3988110 + ... + 4020828.

It is an arithmetic number, because the mean of its divisors is an integer number (4772539200).

Almost surely, 2^131022221211 is an apocalyptic number.

131022221211 is a deficient number, since it is larger than the sum of its proper divisors (98059660389).

131022221211 is a wasteful number, since it uses less digits than its factorization.

131022221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36488 (or 36485 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 131022221211 its reverse (112122220131), we get a palindrome (243144441342).

The spelling of 131022221211 in words is "one hundred thirty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred eleven".