131220110212 has 12 divisors (see below), whose sum is σ = 231908809356. Its totient is φ = 64960450400.

The previous prime is 131220110207. The next prime is 131220110237. The reversal of 131220110212 is 212011022131.

It can be written as a sum of positive squares in 2 ways, for example, as 128955682816 + 2264427396 = 359104^2 + 47586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162400723 + ... + 162401530.

It is an arithmetic number, because the mean of its divisors is an integer number (19325734113).

Almost surely, 2^131220110212 is an apocalyptic number.

It is an amenable number.

131220110212 is a deficient number, since it is larger than the sum of its proper divisors (100688699144).

131220110212 is a wasteful number, since it uses less digits than its factorization.

131220110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324802358 (or 324802356 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 131220110212 its reverse (212011022131), we get a palindrome (343231132343).

The spelling of 131220110212 in words is "one hundred thirty-one billion, two hundred twenty million, one hundred ten thousand, two hundred twelve".