131220022012 has 12 divisors (see below), whose sum is σ = 241721093320. Its totient is φ = 62156852496.

The previous prime is 131220021953. The next prime is 131220022013. The reversal of 131220022012 is 210220022131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220022013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863289543 + ... + 863289694.

Almost surely, 2^131220022012 is an apocalyptic number.

It is an amenable number.

131220022012 is a deficient number, since it is larger than the sum of its proper divisors (110501071308).

131220022012 is a wasteful number, since it uses less digits than its factorization.

131220022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726579260 (or 1726579258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 131220022012 its reverse (210220022131), we get a palindrome (341440044143).

The spelling of 131220022012 in words is "one hundred thirty-one billion, two hundred twenty million, twenty-two thousand, twelve".