201221022102012 has 72 divisors (see below), whose sum is σ = 566688217036032. Its totient is φ = 59678704164000.

The previous prime is 201221022101867. The next prime is 201221022102029. The reversal of 201221022102012 is 210201220122102.

It is a happy number.

201221022102012 is a `hidden beast` number, since 20 + 1 + 221 + 0 + 221 + 0 + 201 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5405661114 + ... + 5405698337.

It is an arithmetic number, because the mean of its divisors is an integer number (7870669681056).

Almost surely, 2^{201221022102012} is an apocalyptic number.

201221022102012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201221022102012 is an abundant number, since it is smaller than the sum of its proper divisors (365467194934020).

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

201221022102012 is a wasteful number, since it uses less digits than its factorization.

201221022102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811359519 (or 10811359514 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201221022102012 its reverse (210201220122102), we get a palindrome (411422242224114).

It can be divided in two parts, 20122102 and 2102012, that multiplied together give a palindrome (42296899869224).

The spelling of 201221022102012 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-two million, one hundred two thousand, twelve".