1121453212 has 48 divisors (see below), whose sum is σ = 2271773952. Its totient is φ = 478734080.

The previous prime is 1121453209. The next prime is 1121453231. The reversal of 1121453212 is 2123541211.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419793 + ... + 422455.

It is an arithmetic number, because the mean of its divisors is an integer number (47328624).

Almost surely, 2^1121453212 is an apocalyptic number.

It is an amenable number.

1121453212 is an abundant number, since it is smaller than the sum of its proper divisors (1150320740).

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

1121453212 is a wasteful number, since it uses less digits than its factorization.

1121453212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258 (or 3256 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1121453212 is about 33488.1055301729. The cubic root of 1121453212 is about 1038.9477806980.

Adding to 1121453212 its reverse (2123541211), we get a palindrome (3244994423).

The spelling of 1121453212 in words is "one billion, one hundred twenty-one million, four hundred fifty-three thousand, two hundred twelve".