201122222200221 has 16 divisors (see below), whose sum is σ = 306644423625344. Its totient is φ = 114862309369344.

The previous prime is 201122222200187. The next prime is 201122222200231. The reversal of 201122222200221 is 122002222221102.

It is not a de Polignac number, because 201122222200221 - 2²¹ = 201122220103069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122222200231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694742840 + ... + 2694817473.

It is an arithmetic number, because the mean of its divisors is an integer number (19165276476584).

Almost surely, 2^{201122222200221} is an apocalyptic number.

201122222200221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201122222200221 is a deficient number, since it is larger than the sum of its proper divisors (105522201425123).

201122222200221 is a wasteful number, since it uses less digits than its factorization.

201122222200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389562100.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 201122222200221 its reverse (122002222221102), we get a palindrome (323124444421323).

The spelling of 201122222200221 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred thousand, two hundred twenty-one".