1121222212 has 48 divisors (see below), whose sum is σ = 2182985280. Its totient is φ = 499593600.

The previous prime is 1121222209. The next prime is 1121222213. The reversal of 1121222212 is 2122221211.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1121222213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1124098 + ... + 1125094.

It is an arithmetic number, because the mean of its divisors is an integer number (45478860).

Almost surely, 2^1121222212 is an apocalyptic number.

It is an amenable number.

1121222212 is a deficient number, since it is larger than the sum of its proper divisors (1061763068).

1121222212 is a wasteful number, since it uses less digits than its factorization.

1121222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1490 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 1121222212 is about 33484.6563667600. The cubic root of 1121222212 is about 1038.8764406976.

Adding to 1121222212 its reverse (2122221211), we get a palindrome (3243443423).

It can be divided in two parts, 11 and 21222212, that multiplied together give a palindrome (233444332).

The spelling of 1121222212 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".