201221012002 has 4 divisors (see below), whose sum is σ = 301831518006.
Its totient is φ = 100610506000.
The previous prime is 201221011949. The next prime is 201221012033. The reversal of 201221012002 is 200210122102.
Adding to 201221012002 its reverse (200210122102), we get a palindrome (401431134104).
It is a happy number.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 102605543041 + 98615468961 = 320321^2 + 314031^2
It is a super-2 number, since 2×2012210120022 (a number of 23 digits) contains 22 as substring.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50305252999 + ... + 50305253002.
Almost surely, 2201221012002 is an apocalyptic number.
201221012002 is a deficient number, since it is larger than the sum of its proper divisors (100610506004).
201221012002 is a wasteful number, since it uses less digits than its factorization.
201221012002 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 100610506003.
The product of its (nonzero) digits is 32, while the sum is 13.
The spelling of 201221012002 in words is "two hundred one billion, two hundred twenty-one million, twelve thousand, two".