131022221212 has 48 divisors (see below), whose sum is σ = 244729951200. Its totient is φ = 61265111040.

The previous prime is 131022221207. The next prime is 131022221219. The reversal of 131022221212 is 212122220131.

It is a self number, because there is not a number n which added to its sum of digits gives 131022221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022221219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561988 + ... + 760180.

It is an arithmetic number, because the mean of its divisors is an integer number (5098540650).

Almost surely, 2^131022221212 is an apocalyptic number.

It is an amenable number.

131022221212 is a deficient number, since it is larger than the sum of its proper divisors (113707729988).

131022221212 is a wasteful number, since it uses less digits than its factorization.

131022221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198406 (or 198404 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 131022221212 its reverse (212122220131), we get a palindrome (343144441343).

The spelling of 131022221212 in words is "one hundred thirty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred twelve".