2012001221 has 8 divisors (see below), whose sum is σ = 2139911424. Its totient is φ = 1885152960.

The previous prime is 2012001217. The next prime is 2012001227. The reversal of 2012001221 is 1221002102.

It is a happy number.

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 2012001221 - 2² = 2012001217 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 (2012001227) 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, 261575 + ... + 269156.

It is an arithmetic number, because the mean of its divisors is an integer number (267488928).

Almost surely, 2^2012001221 is an apocalyptic number.

It is an amenable number.

2012001221 is a deficient number, since it is larger than the sum of its proper divisors (127910203).

2012001221 is a wasteful number, since it uses less digits than its factorization.

2012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530971.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2012001221 is about 44855.3365944343. The cubic root of 2012001221 is about 1262.4361244159.

Adding to 2012001221 its reverse (1221002102), we get a palindrome (3233003323).

The spelling of 2012001221 in words is "two billion, twelve million, one thousand, two hundred twenty-one".