201101222020221 has 36 divisors (see below), whose sum is σ = 303820106309460. Its totient is φ = 128162835897600.

The previous prime is 201101222020151. The next prime is 201101222020271. The reversal of 201101222020221 is 122020222101102.

It is a happy number.

201101222020221 is a `hidden beast` number, since 201 + 1 + 0 + 1 + 2 + 220 + 20 + 221 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 38293064283321 + 162808157736900 = 6188139^2 + 12759630^2 .

It is not a de Polignac number, because 201101222020221 - 2²⁵ = 201101188465789 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201101222020194 and 201101222020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101222020271) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130765536 + ... + 132294473.

It is an arithmetic number, because the mean of its divisors is an integer number (8439447397485).

Almost surely, 2^{201101222020221} is an apocalyptic number.

It is an amenable number.

201101222020221 is a deficient number, since it is larger than the sum of its proper divisors (102718884289239).

201101222020221 is a wasteful number, since it uses less digits than its factorization.

201101222020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263060174 (or 263060142 counting only the distinct ones).

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

Adding to 201101222020221 its reverse (122020222101102), we get a palindrome (323121444121323).

The spelling of 201101222020221 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-two million, twenty thousand, two hundred twenty-one".