201222121001 has 16 divisors (see below), whose sum is σ = 232873921728. Its totient is φ = 171838118400.

The previous prime is 201222120989. The next prime is 201222121021. The reversal of 201222121001 is 100121222102.

It is a cyclic number.

It is not a de Polignac number, because 201222121001 - 2¹⁰ = 201222119977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201222121021) 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, 935255 + ... + 1130108.

It is an arithmetic number, because the mean of its divisors is an integer number (14554620108).

Almost surely, 2^201222121001 is an apocalyptic number.

It is an amenable number.

201222121001 is a deficient number, since it is larger than the sum of its proper divisors (31651800727).

201222121001 is a wasteful number, since it uses less digits than its factorization.

201222121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065912.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201222121001 its reverse (100121222102), we get a palindrome (301343343103).

It can be divided in two parts, 201222 and 121001, that added together give a palindrome (322223).

The spelling of 201222121001 in words is "two hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, one".