201222222121 has 16 divisors (see below), whose sum is σ = 204066705024. Its totient is φ = 198396123264.

The previous prime is 201222222119. The next prime is 201222222127. The reversal of 201222222121 is 121222222102.

It is a cyclic number.

It is not a de Polignac number, because 201222222121 - 2¹ = 201222222119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201222222127) 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, 47714805 + ... + 47719021.

It is an arithmetic number, because the mean of its divisors is an integer number (12754169064).

Almost surely, 2^201222222121 is an apocalyptic number.

It is an amenable number.

201222222121 is a deficient number, since it is larger than the sum of its proper divisors (2844482903).

201222222121 is a wasteful number, since it uses less digits than its factorization.

201222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240.

The product of its (nonzero) digits is 256, while the sum is 19.

Subtracting from 201222222121 its sum of digits (19), we obtain a palindrome (201222222102).

Adding to 201222222121 its reverse (121222222102), we get a palindrome (322444444223).

The spelling of 201222222121 in words is "two hundred one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".