201221121101110 has 48 divisors (see below), whose sum is σ = 404866253610000. Its totient is φ = 71931124928960.

The previous prime is 201221121101089. The next prime is 201221121101111. The reversal of 201221121101110 is 11101121122102.

201221121101110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×201221121101110³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221121101111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1409237485 + ... + 1409380264.

It is an arithmetic number, because the mean of its divisors is an integer number (8434713616875).

Almost surely, 2^{201221121101110} is an apocalyptic number.

201221121101110 is an abundant number, since it is smaller than the sum of its proper divisors (203645132508890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201221121101110 is a wasteful number, since it uses less digits than its factorization.

201221121101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818617837 (or 2818617826 counting only the distinct ones).

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

Adding to 201221121101110 its reverse (11101121122102), we get a palindrome (212322242223212).

The spelling of 201221121101110 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred one thousand, one hundred ten".