201221002012 has 24 divisors (see below), whose sum is σ = 354944000880. Its totient is φ = 99809548800.

The previous prime is 201221002009. The next prime is 201221002013. The reversal of 201221002012 is 210200122102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201221001983 and 201221002001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221002013) 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, 584268 + ... + 862444.

It is an arithmetic number, because the mean of its divisors is an integer number (14789333370).

Almost surely, 2^201221002012 is an apocalyptic number.

It is an amenable number.

201221002012 is a deficient number, since it is larger than the sum of its proper divisors (153722998868).

201221002012 is a wasteful number, since it uses less digits than its factorization.

201221002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279621 (or 279619 counting only the distinct ones).

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

Adding to 201221002012 its reverse (210200122102), we get a palindrome (411421124114).

The spelling of 201221002012 in words is "two hundred one billion, two hundred twenty-one million, two thousand, twelve".