1211124225 has 24 divisors (see below), whose sum is σ = 2089455552. Its totient is φ = 617848000.

The previous prime is 1211124209. The next prime is 1211124241. The reversal of 1211124225 is 5224211121.

It is an interprime number because it is at equal distance from previous prime (1211124209) and next prime (1211124241).

It is not a de Polignac number, because 1211124225 - 2⁴ = 1211124209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349326 + ... + 352775.

It is an arithmetic number, because the mean of its divisors is an integer number (87060648).

Almost surely, 2^1211124225 is an apocalyptic number.

1211124225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211124225 is a deficient number, since it is larger than the sum of its proper divisors (878331327).

1211124225 is a wasteful number, since it uses less digits than its factorization.

1211124225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702137 (or 702132 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 1211124225 is about 34801.2101082707. The cubic root of 1211124225 is about 1065.9321557330.

Adding to 1211124225 its reverse (5224211121), we get a palindrome (6435335346).

The spelling of 1211124225 in words is "one billion, two hundred eleven million, one hundred twenty-four thousand, two hundred twenty-five".