12122121012212 has 6 divisors (see below), whose sum is σ = 21213711771378. Its totient is φ = 6061060506104.

The previous prime is 12122121012187. The next prime is 12122121012227. The reversal of 12122121012212 is 21221012122121.

It can be written as a sum of positive squares in only one way, i.e., 7004735049316 + 5117385962896 = 2646646^2 + 2262164^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515265126523 + ... + 1515265126530.

It is an arithmetic number, because the mean of its divisors is an integer number (3535618628563).

Almost surely, 2^{12122121012212} is an apocalyptic number.

It is an amenable number.

12122121012212 is a deficient number, since it is larger than the sum of its proper divisors (9091590759166).

12122121012212 is a wasteful number, since it uses less digits than its factorization.

12122121012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030530253057 (or 3030530253055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12122121012212 its reverse (21221012122121), we get a palindrome (33343133134333).

The spelling of 12122121012212 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, two hundred twelve".