2011221010204 has 36 divisors (see below), whose sum is σ = 4204934695024. Its totient is φ = 824475687552.

The previous prime is 2011221010039. The next prime is 2011221010207. The reversal of 2011221010204 is 4020101221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221010207) 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 11 ways as a sum of consecutive naturals, for example, 67876797 + ... + 67906420.

Almost surely, 2^{2011221010204} is an apocalyptic number.

It is an amenable number.

2011221010204 is an abundant number, since it is smaller than the sum of its proper divisors (2193713684820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011221010204 is a wasteful number, since it uses less digits than its factorization.

2011221010204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135783274 (or 135783249 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2011221010204 its reverse (4020101221102), we get a palindrome (6031322231306).

The spelling of 2011221010204 in words is "two trillion, eleven billion, two hundred twenty-one million, ten thousand, two hundred four".