1211873225 has 12 divisors (see below), whose sum is σ = 1509851280. Its totient is φ = 964899600.

The previous prime is 1211873209. The next prime is 1211873233. The reversal of 1211873225 is 5223781121.

It is not a de Polignac number, because 1211873225 - 2⁴ = 1211873209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211873191 and 1211873200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109595 + ... + 120144.

It is an arithmetic number, because the mean of its divisors is an integer number (125820940).

Almost surely, 2^1211873225 is an apocalyptic number.

It is an amenable number.

1211873225 is a deficient number, since it is larger than the sum of its proper divisors (297978055).

1211873225 is a wasteful number, since it uses less digits than its factorization.

1211873225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229960 (or 229955 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 1211873225 is about 34811.9695650792. The cubic root of 1211873225 is about 1066.1518465630.

The spelling of 1211873225 in words is "one billion, two hundred eleven million, eight hundred seventy-three thousand, two hundred twenty-five".