1121212450 has 12 divisors (see below), whose sum is σ = 2085455250. Its totient is φ = 448484960.

The previous prime is 1121212429. The next prime is 1121212457. The reversal of 1121212450 is 542121211.

It can be written as a sum of positive squares in 3 ways, for example, as 514427761 + 606784689 = 22681^2 + 24633^2 .

It is not an unprimeable number, because it can be changed into a prime (1121212457) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11212075 + ... + 11212174.

Almost surely, 2^1121212450 is an apocalyptic number.

1121212450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121212450 is a deficient number, since it is larger than the sum of its proper divisors (964242800).

1121212450 is a wasteful number, since it uses less digits than its factorization.

1121212450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22424261 (or 22424256 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1121212450 is about 33484.5105981855. The cubic root of 1121212450 is about 1038.8734256719.

Adding to 1121212450 its reverse (542121211), we get a palindrome (1663333661).

The spelling of 1121212450 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, four hundred fifty".