1211125444 has 24 divisors (see below), whose sum is σ = 2263060800. Its totient is φ = 565761504.

The previous prime is 1211125393. The next prime is 1211125471. The reversal of 1211125444 is 4445211121.

It is a super-2 number, since 2×1211125444² = 2933649682208394272, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 149119 + ... + 157030.

It is an arithmetic number, because the mean of its divisors is an integer number (94294200).

Almost surely, 2^1211125444 is an apocalyptic number.

It is an amenable number.

1211125444 is a deficient number, since it is larger than the sum of its proper divisors (1051935356).

1211125444 is a wasteful number, since it uses less digits than its factorization.

1211125444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306219 (or 306217 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 1211125444 is about 34801.2276220251. The cubic root of 1211125444 is about 1065.9325133541.

Adding to 1211125444 its reverse (4445211121), we get a palindrome (5656336565).

The spelling of 1211125444 in words is "one billion, two hundred eleven million, one hundred twenty-five thousand, four hundred forty-four".