1212021112 has 16 divisors (see below), whose sum is σ = 2299920840. Its totient is φ = 598708896.

The previous prime is 1212021073. The next prime is 1212021113. The reversal of 1212021112 is 2111202121.

It is a junction number, because it is equal to n+sod(n) for n = 1212021092 and 1212021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912003 + ... + 913330.

Almost surely, 2^1212021112 is an apocalyptic number.

It is an amenable number.

1212021112 is a deficient number, since it is larger than the sum of its proper divisors (1087899728).

1212021112 is a wasteful number, since it uses less digits than its factorization.

1212021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825422 (or 1825418 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1212021112 is about 34814.0935829155. The cubic root of 1212021112 is about 1066.1952129212.

Adding to 1212021112 its reverse (2111202121), we get a palindrome (3323223233).

The spelling of 1212021112 in words is "one billion, two hundred twelve million, twenty-one thousand, one hundred twelve".