1212121304 has 16 divisors (see below), whose sum is σ = 2294794320. Its totient is φ = 600176160.

The previous prime is 1212121291. The next prime is 1212121307. The reversal of 1212121304 is 4031212121.

It is a super-2 number, since 2×1212121304² = 2938476111221320832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212121307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734687 + ... + 736334.

It is an arithmetic number, because the mean of its divisors is an integer number (143424645).

Almost surely, 2^1212121304 is an apocalyptic number.

It is an amenable number.

1212121304 is a deficient number, since it is larger than the sum of its proper divisors (1082673016).

1212121304 is a wasteful number, since it uses less digits than its factorization.

1212121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471130 (or 1471126 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1212121304 is about 34815.5325106482. The cubic root of 1212121304 is about 1066.2245912014.

Adding to 1212121304 its reverse (4031212121), we get a palindrome (5243333425).

The spelling of 1212121304 in words is "one billion, two hundred twelve million, one hundred twenty-one thousand, three hundred four".