12010211221 has 8 divisors (see below), whose sum is σ = 13026858264. Its totient is φ = 11028026880.

The previous prime is 12010211219. The next prime is 12010211237. The reversal of 12010211221 is 12211201021.

It can be written as a sum of positive squares in 4 ways, for example, as 104346225 + 11905864996 = 10215^2 + 109114^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12010211221 - 2¹ = 12010211219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010211261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8614950 + ... + 8616343.

It is an arithmetic number, because the mean of its divisors is an integer number (1628357283).

Almost surely, 2^12010211221 is an apocalyptic number.

It is an amenable number.

12010211221 is a deficient number, since it is larger than the sum of its proper divisors (1016647043).

12010211221 is a wasteful number, since it uses less digits than its factorization.

12010211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17231351.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12010211221 its reverse (12211201021), we get a palindrome (24221412242).

It can be divided in two parts, 1201021 and 1221, that multiplied together give a palindrome (1466446641).

The spelling of 12010211221 in words is "twelve billion, ten million, two hundred eleven thousand, two hundred twenty-one".