12212115 has 16 divisors (see below), whose sum is σ = 19872000. Its totient is φ = 6402272.

The previous prime is 12212113. The next prime is 12212119. The reversal of 12212115 is 51121221.

It is a cyclic number.

It is not a de Polignac number, because 12212115 - 2¹ = 12212113 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12212094 and 12212103.

It is not an unprimeable number, because it can be changed into a prime (12212111) 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, 6015 + ... + 7784.

It is an arithmetic number, because the mean of its divisors is an integer number (1242000).

Almost surely, 2^12212115 is an apocalyptic number.

12212115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12212115 is a deficient number, since it is larger than the sum of its proper divisors (7659885).

12212115 is a wasteful number, since it uses less digits than its factorization.

12212115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13866.

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

The square root of 12212115 is about 3494.5836661897. The cubic root of 12212115 is about 230.2839278685.

Adding to 12212115 its reverse (51121221), we get a palindrome (63333336).

The spelling of 12212115 in words is "twelve million, two hundred twelve thousand, one hundred fifteen".