201221011102 has 4 divisors (see below), whose sum is σ = 301831516656. Its totient is φ = 100610505550.

The previous prime is 201221011097. The next prime is 201221011109. The reversal of 201221011102 is 201110122102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201110122102 = 2 ⋅100555061051.

It is a super-2 number, since 2×201221011102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221011109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50305252774 + ... + 50305252777.

It is an arithmetic number, because the mean of its divisors is an integer number (75457879164).

Almost surely, 2^201221011102 is an apocalyptic number.

201221011102 is a deficient number, since it is larger than the sum of its proper divisors (100610505554).

201221011102 is a wasteful number, since it uses less digits than its factorization.

201221011102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100610505553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201221011102 its reverse (201110122102), we get a palindrome (402331133204).

The spelling of 201221011102 in words is "two hundred one billion, two hundred twenty-one million, eleven thousand, one hundred two".