201222221012 has 24 divisors (see below), whose sum is σ = 372886340904. Its totient is φ = 94684326912.

The previous prime is 201222221003. The next prime is 201222221017. The reversal of 201222221012 is 210122222102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54964926916 + 146257294096 = 234446^2 + 382436^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222221017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667328 + ... + 920744.

It is an arithmetic number, because the mean of its divisors is an integer number (15536930871).

Almost surely, 2^201222221012 is an apocalyptic number.

It is an amenable number.

201222221012 is a deficient number, since it is larger than the sum of its proper divisors (171664119892).

201222221012 is a wasteful number, since it uses less digits than its factorization.

201222221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265115 (or 265113 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201222221012 its reverse (210122222102), we get a palindrome (411344443114).

The spelling of 201222221012 in words is "two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, twelve".