201222201204 has 36 divisors (see below), whose sum is σ = 508737973380. Its totient is φ = 67061808000.

The previous prime is 201222201161. The next prime is 201222201217. The reversal of 201222201204 is 402102222102.

It can be written as a sum of positive squares in 2 ways, for example, as 200168549604 + 1053651600 = 447402^2 + 32460^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310009 + ... + 706080.

Almost surely, 2^201222201204 is an apocalyptic number.

It is an amenable number.

201222201204 is an abundant number, since it is smaller than the sum of its proper divisors (307515772176).

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

201222201204 is a wasteful number, since it uses less digits than its factorization.

201222201204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021600 (or 1021595 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 201222201204 its reverse (402102222102), we get a palindrome (603324423306).

The spelling of 201222201204 in words is "two hundred one billion, two hundred twenty-two million, two hundred one thousand, two hundred four".