201221202111002 has 4 divisors (see below), whose sum is σ = 301831803166506. Its totient is φ = 100610601055500.

The previous prime is 201221202110983. The next prime is 201221202111037. The reversal of 201221202111002 is 200111202122102.

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., 189318364008601 + 11902838102401 = 13759301^2 + 3450049^2 .

It is a super-2 number, since 2×201221202111002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50305300527749 + ... + 50305300527752.

Almost surely, 2^{201221202111002} is an apocalyptic number.

201221202111002 is a deficient number, since it is larger than the sum of its proper divisors (100610601055504).

201221202111002 is a wasteful number, since it uses less digits than its factorization.

201221202111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100610601055503.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201221202111002 its reverse (200111202122102), we get a palindrome (401332404233104).

The spelling of 201221202111002 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, two".