11211225 has 24 divisors (see below), whose sum is σ = 18769632. Its totient is φ = 5904000.

The previous prime is 11211217. The next prime is 11211229. The reversal of 11211225 is 52211211.

11211225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11211225 - 2³ = 11211217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11211229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5325 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (782068).

Almost surely, 2^11211225 is an apocalyptic number.

11211225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11211225 is a deficient number, since it is larger than the sum of its proper divisors (7558407).

11211225 is a wasteful number, since it uses less digits than its factorization.

11211225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1892 counting only the distinct ones).

The product of its digits is 40, while the sum is 15.

The square root of 11211225 is about 3348.3167412896. The cubic root of 11211225 is about 223.8125091937.

Adding to 11211225 its reverse (52211211), we get a palindrome (63422436).

It can be divided in two parts, 1121 and 1225, that added together give a triangular number (2346 = T₆₈).

The spelling of 11211225 in words is "eleven million, two hundred eleven thousand, two hundred twenty-five".