1225041111 has 96 divisors (see below), whose sum is σ = 2227322880. Its totient is φ = 662219712.

The previous prime is 1225041107. The next prime is 1225041119. The reversal of 1225041111 is 1111405221.

1225041111 is a `hidden beast` number, since 1 + 2 + 250 + 411 + 1 + 1 = 666.

It is not a de Polignac number, because 1225041111 - 2² = 1225041107 is a prime.

It is a super-2 number, since 2×1225041111² = 3001451447280228642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225041119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3864325 + ... + 3864641.

It is an arithmetic number, because the mean of its divisors is an integer number (23201280).

Almost surely, 2^1225041111 is an apocalyptic number.

1225041111 is a deficient number, since it is larger than the sum of its proper divisors (1002281769).

1225041111 is a wasteful number, since it uses less digits than its factorization.

1225041111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1225041111 is about 35000.5872950726. The cubic root of 1225041111 is about 1069.9994500245. Note that the first 3 decimals are identical.

Adding to 1225041111 its reverse (1111405221), we get a palindrome (2336446332).

It can be divided in two parts, 12250 and 41111, that added together give a square (53361 = 231²).

The spelling of 1225041111 in words is "one billion, two hundred twenty-five million, forty-one thousand, one hundred eleven".