12021215 has 8 divisors (see below), whose sum is σ = 14536368. Its totient is φ = 9543040.

The previous prime is 12021187. The next prime is 12021259. The reversal of 12021215 is 51212021.

12021215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021215 - 2¹⁶ = 11955679 is a prime.

It is a super-2 number, since 2×12021215² = 289019220152450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8522 + ... + 9831.

It is an arithmetic number, because the mean of its divisors is an integer number (1817046).

Almost surely, 2^12021215 is an apocalyptic number.

12021215 is a deficient number, since it is larger than the sum of its proper divisors (2515153).

12021215 is a wasteful number, since it uses less digits than its factorization.

12021215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18489.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12021215 is about 3467.1623844291. The cubic root of 12021215 is about 229.0776863737.

Adding to 12021215 its reverse (51212021), we get a palindrome (63233236).

The spelling of 12021215 in words is "twelve million, twenty-one thousand, two hundred fifteen".