201221211002 has 16 divisors (see below), whose sum is σ = 345017249280. Its totient is φ = 86221011408.

The previous prime is 201221211001. The next prime is 201221211011. The reversal of 201221211002 is 200112122102.

It is a super-2 number, since 2×201221211002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (201221211001) 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, 1312298 + ... + 1457589.

It is an arithmetic number, because the mean of its divisors is an integer number (21563578080).

Almost surely, 2^201221211002 is an apocalyptic number.

201221211002 is a deficient number, since it is larger than the sum of its proper divisors (143796038278).

201221211002 is a wasteful number, since it uses less digits than its factorization.

201221211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775085.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201221211002 its reverse (200112122102), we get a palindrome (401333333104).

The spelling of 201221211002 in words is "two hundred one billion, two hundred twenty-one million, two hundred eleven thousand, two".