201220222444424 has 8 divisors (see below), whose sum is σ = 377287917083310. Its totient is φ = 100610111222208.

The previous prime is 201220222444399. The next prime is 201220222444427. The reversal of 201220222444424 is 424444222022102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 150865161467524 + 50355060976900 = 12282718^2 + 7096130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (201220222444427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12576263902769 + ... + 12576263902784.

Almost surely, 2^{201220222444424} is an apocalyptic number.

It is an amenable number.

201220222444424 is a deficient number, since it is larger than the sum of its proper divisors (176067694638886).

201220222444424 is a wasteful number, since it uses less digits than its factorization.

201220222444424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25152527805559 (or 25152527805555 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 201220222444424 its reverse (424444222022102), we get a palindrome (625664444466526).

The spelling of 201220222444424 in words is "two hundred one trillion, two hundred twenty billion, two hundred twenty-two million, four hundred forty-four thousand, four hundred twenty-four".