11121215 has 16 divisors (see below), whose sum is σ = 15504960. Its totient is φ = 7499520.

The previous prime is 11121197. The next prime is 11121217. The reversal of 11121215 is 51212111.

It is not a de Polignac number, because 11121215 - 2²⁰ = 10072639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11121215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470 + ... + 4739.

It is an arithmetic number, because the mean of its divisors is an integer number (969060).

Almost surely, 2^11121215 is an apocalyptic number.

11121215 is a deficient number, since it is larger than the sum of its proper divisors (4383745).

11121215 is an equidigital number, since it uses as much as digits as its factorization.

11121215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282.

The product of its digits is 20, while the sum is 14.

The square root of 11121215 is about 3334.8485722743. The cubic root of 11121215 is about 223.2119349634.

Adding to 11121215 its reverse (51212111), we get a palindrome (62333326).

The spelling of 11121215 in words is "eleven million, one hundred twenty-one thousand, two hundred fifteen".