131123212 has 24 divisors (see below), whose sum is σ = 251152272. Its totient is φ = 59404800.

The previous prime is 131123203. The next prime is 131123249. The reversal of 131123212 is 212321131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9012 + ... + 18532.

It is an arithmetic number, because the mean of its divisors is an integer number (10464678).

Almost surely, 2^131123212 is an apocalyptic number.

It is an amenable number.

131123212 is a deficient number, since it is larger than the sum of its proper divisors (120029060).

131123212 is a wasteful number, since it uses less digits than its factorization.

131123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9849 (or 9847 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 131123212 is about 11450.9044184291. The cubic root of 131123212 is about 508.0344852279.

Adding to 131123212 its reverse (212321131), we get a palindrome (343444343).

The spelling of 131123212 in words is "one hundred thirty-one million, one hundred twenty-three thousand, two hundred twelve".