1121221212 has 24 divisors (see below), whose sum is σ = 2686891536. Its totient is φ = 363639168.

The previous prime is 1121221183. The next prime is 1121221223. The reversal of 1121221212 is 2121221211.

It is a super-3 number, since 3×1121221212³ (a number of 28 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1121221191 and 1121221200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262193 + ... + 1263080.

It is an arithmetic number, because the mean of its divisors is an integer number (111953814).

Almost surely, 2^1121221212 is an apocalyptic number.

1121221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121221212 is an abundant number, since it is smaller than the sum of its proper divisors (1565670324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121221212 is a wasteful number, since it uses less digits than its factorization.

1121221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525317 (or 2525315 counting only the distinct ones).

The product of its digits is 32, while the sum is 15.

The square root of 1121221212 is about 33484.6414345443. The cubic root of 1121221212 is about 1038.8761318451.

Adding to 1121221212 its reverse (2121221211), we get a palindrome (3242442423).

Subtracting 1121221212 from its reverse (2121221211), we obtain a palindrome (999999999).

The spelling of 1121221212 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".