12010001211 has 24 divisors (see below), whose sum is σ = 18801247920. Its totient is φ = 7343683776.

The previous prime is 12010001209. The next prime is 12010001221. The reversal of 12010001211 is 11210001021.

It is a happy number.

It is not a de Polignac number, because 12010001211 - 2¹ = 12010001209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12010001193 and 12010001202.

It is not an unprimeable number, because it can be changed into a prime (12010001221) 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 23 ways as a sum of consecutive naturals, for example, 308541 + ... + 345278.

It is an arithmetic number, because the mean of its divisors is an integer number (783385330).

Almost surely, 2^12010001211 is an apocalyptic number.

12010001211 is a deficient number, since it is larger than the sum of its proper divisors (6791246709).

12010001211 is a wasteful number, since it uses less digits than its factorization.

12010001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653995 (or 653992 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12010001211 its reverse (11210001021), we get a palindrome (23220002232).

The spelling of 12010001211 in words is "twelve billion, ten million, one thousand, two hundred eleven".