12111001221010 has 16 divisors (see below), whose sum is σ = 23082143503896. Its totient is φ = 4559435753728.

The previous prime is 12111001220999. The next prime is 12111001221037. The reversal of 12111001221010 is 1012210011121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11240805158361 + 870196062649 = 3352731^2 + 932843^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35620591657 + ... + 35620591996.

Almost surely, 2^{12111001221010} is an apocalyptic number.

12111001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111001221010 is a deficient number, since it is larger than the sum of its proper divisors (10971142282886).

12111001221010 is a wasteful number, since it uses less digits than its factorization.

12111001221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71241183677.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12111001221010 its reverse (1012210011121), we get a palindrome (13123211232131).

The spelling of 12111001221010 in words is "twelve trillion, one hundred eleven billion, one million, two hundred twenty-one thousand, ten".