1121220212 has 24 divisors (see below), whose sum is σ = 2243848320. Its totient is φ = 480221280.

The previous prime is 1121220179. The next prime is 1121220241. The reversal of 1121220212 is 2120221211.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 36137 + ... + 59567.

It is an arithmetic number, because the mean of its divisors is an integer number (93493680).

Almost surely, 2^1121220212 is an apocalyptic number.

It is an amenable number.

1121220212 is an abundant number, since it is smaller than the sum of its proper divisors (1122628108).

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

1121220212 is a wasteful number, since it uses less digits than its factorization.

1121220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25151 (or 25149 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1121220212 is about 33484.6265023219. The cubic root of 1121220212 is about 1038.8758229925.

Adding to 1121220212 its reverse (2120221211), we get a palindrome (3241441423).

Subtracting 1121220212 from its reverse (2120221211), we obtain a palindrome (999000999).

The spelling of 1121220212 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".