2012000021221 has 48 divisors (see below), whose sum is σ = 2252909936640. Its totient is φ = 1794032491680.

The previous prime is 2012000021201. The next prime is 2012000021231. The reversal of 2012000021221 is 1221200002102.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2012000021221 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 (2012000021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59216980 + ... + 59250946.

It is an arithmetic number, because the mean of its divisors is an integer number (46935623680).

Almost surely, 2^{2012000021221} is an apocalyptic number.

It is an amenable number.

2012000021221 is a deficient number, since it is larger than the sum of its proper divisors (240909915419).

2012000021221 is a wasteful number, since it uses less digits than its factorization.

2012000021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34182 (or 34163 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2012000021221 its reverse (1221200002102), we get a palindrome (3233200023323).

The spelling of 2012000021221 in words is "two trillion, twelve billion, twenty-one thousand, two hundred twenty-one".