1321121212 has 12 divisors (see below), whose sum is σ = 2312251200. Its totient is φ = 660478016.

The previous prime is 1321121161. The next prime is 1321121213. The reversal of 1321121212 is 2121211231.

It is a super-2 number, since 2×1321121212² = 3490722513592697888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321121213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28164 + ... + 58612.

It is an arithmetic number, because the mean of its divisors is an integer number (192687600).

Almost surely, 2^1321121212 is an apocalyptic number.

It is an amenable number.

1321121212 is a deficient number, since it is larger than the sum of its proper divisors (991129988).

1321121212 is a wasteful number, since it uses less digits than its factorization.

1321121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41300 (or 41298 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 1321121212 is about 36347.2311462648. The cubic root of 1321121212 is about 1097.2718100104.

Adding to 1321121212 its reverse (2121211231), we get a palindrome (3442332443).

The spelling of 1321121212 in words is "one billion, three hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".