131173020212 has 24 divisors (see below), whose sum is σ = 247376862600. Its totient is φ = 60500699136.

The previous prime is 131173020203. The next prime is 131173020233. The reversal of 131173020212 is 212020371131.

It can be written as a sum of positive squares in 4 ways, for example, as 10288856356 + 120884163856 = 101434^2 + 347684^2 .

It is a super-2 number, since 2×131173020212² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769637 + ... + 924492.

It is an arithmetic number, because the mean of its divisors is an integer number (10307369275).

Almost surely, 2^131173020212 is an apocalyptic number.

It is an amenable number.

131173020212 is a deficient number, since it is larger than the sum of its proper divisors (116203842388).

131173020212 is a wasteful number, since it uses less digits than its factorization.

131173020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695635 (or 1695633 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 131173020212 its reverse (212020371131), we get a palindrome (343193391343).

The spelling of 131173020212 in words is "one hundred thirty-one billion, one hundred seventy-three million, twenty thousand, two hundred twelve".