12021032115 has 24 divisors (see below), whose sum is σ = 20871639360. Its totient is φ = 6400391424.

The previous prime is 12021032053. The next prime is 12021032137. The reversal of 12021032115 is 51123012021.

12021032115 is a `hidden beast` number, since 120 + 210 + 321 + 15 = 666.

It is not a de Polignac number, because 12021032115 - 2⁷ = 12021031987 is a prime.

It is a super-2 number, since 2×12021032115² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198555 + ... + 251924.

It is an arithmetic number, because the mean of its divisors is an integer number (869651640).

Almost surely, 2^12021032115 is an apocalyptic number.

12021032115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12021032115 is a deficient number, since it is larger than the sum of its proper divisors (8850607245).

12021032115 is a wasteful number, since it uses less digits than its factorization.

12021032115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451083 (or 451080 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 12021032115 its reverse (51123012021), we get a palindrome (63144044136).

The spelling of 12021032115 in words is "twelve billion, twenty-one million, thirty-two thousand, one hundred fifteen".