12021276215 has 32 divisors (see below), whose sum is σ = 16459220736. Its totient is φ = 8349880320.

The previous prime is 12021276173. The next prime is 12021276217. The reversal of 12021276215 is 51267212021.

It is a happy number.

12021276215 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 12021276215 - 2²⁴ = 12004498999 is a prime.

It is a super-2 number, since 2×12021276215² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021276217) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2949419 + ... + 2953491.

It is an arithmetic number, because the mean of its divisors is an integer number (514350648).

Almost surely, 2^12021276215 is an apocalyptic number.

12021276215 is a deficient number, since it is larger than the sum of its proper divisors (4437944521).

12021276215 is a wasteful number, since it uses less digits than its factorization.

12021276215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 12021276215 its reverse (51267212021), we get a palindrome (63288488236).

The spelling of 12021276215 in words is "twelve billion, twenty-one million, two hundred seventy-six thousand, two hundred fifteen".