102122212 has 6 divisors (see below), whose sum is σ = 178713878. Its totient is φ = 51061104.

The previous prime is 102122203. The next prime is 102122219. The reversal of 102122212 is 212221201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56640676 + 45481536 = 7526^2 + 6744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102122192 and 102122201.

It is not an unprimeable number, because it can be changed into a prime (102122219) 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 as a sum of consecutive naturals, namely, 12765273 + ... + 12765280.

Almost surely, 2^102122212 is an apocalyptic number.

It is an amenable number.

102122212 is a deficient number, since it is larger than the sum of its proper divisors (76591666).

102122212 is a wasteful number, since it uses less digits than its factorization.

102122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25530557 (or 25530555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 102122212 is about 10105.5535226924. The cubic root of 102122212 is about 467.4194044483.

Adding to 102122212 its reverse (212221201), we get a palindrome (314343413).

The spelling of 102122212 in words is "one hundred two million, one hundred twenty-two thousand, two hundred twelve".