102131212 has 12 divisors (see below), whose sum is σ = 182102256. Its totient is φ = 50102000.

The previous prime is 102131209. The next prime is 102131219. The reversal of 102131212 is 212131201.

It is a junction number, because it is equal to n+sod(n) for n = 102131192 and 102131201.

It is not an unprimeable number, because it can be changed into a prime (102131219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 240664 + ... + 241087.

It is an arithmetic number, because the mean of its divisors is an integer number (15175188).

Almost surely, 2^102131212 is an apocalyptic number.

It is an amenable number.

102131212 is a deficient number, since it is larger than the sum of its proper divisors (79971044).

102131212 is a wasteful number, since it uses less digits than its factorization.

102131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481808 (or 481806 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102131212 is about 10105.9988125865. The cubic root of 102131212 is about 467.4331352224.

Adding to 102131212 its product of nonzero digits (24), we get a square (102131236 = 10106²).

Adding to 102131212 its reverse (212131201), we get a palindrome (314262413).

The spelling of 102131212 in words is "one hundred two million, one hundred thirty-one thousand, two hundred twelve".