12512021211 has 8 divisors (see below), whose sum is σ = 18536327760. Its totient is φ = 8341347456.

The previous prime is 12512021201. The next prime is 12512021213. The reversal of 12512021211 is 11212021521.

12512021211 is a `hidden beast` number, since 1 + 251 + 202 + 1 + 211 = 666.

It is not a de Polignac number, because 12512021211 - 2⁶ = 12512021147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12512021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231704070 + ... + 231704123.

It is an arithmetic number, because the mean of its divisors is an integer number (2317040970).

Almost surely, 2^12512021211 is an apocalyptic number.

12512021211 is a deficient number, since it is larger than the sum of its proper divisors (6024306549).

12512021211 is an equidigital number, since it uses as much as digits as its factorization.

12512021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463408202 (or 463408196 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12512021211 its reverse (11212021521), we get a palindrome (23724042732).

The spelling of 12512021211 in words is "twelve billion, five hundred twelve million, twenty-one thousand, two hundred eleven".