201212002221121 has 16 divisors (see below), whose sum is σ = 215276619351040. Its totient is φ = 187494904379520.

The previous prime is 201212002221107. The next prime is 201212002221151. The reversal of 201212002221121 is 121122200212102.

It is not a de Polignac number, because 201212002221121 - 2⁵ = 201212002221089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212002221151) 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, 111181141 + ... + 112976413.

It is an arithmetic number, because the mean of its divisors is an integer number (13454788709440).

Almost surely, 2^{201212002221121} is an apocalyptic number.

It is an amenable number.

201212002221121 is a deficient number, since it is larger than the sum of its proper divisors (14064617129919).

201212002221121 is a wasteful number, since it uses less digits than its factorization.

201212002221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892056.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201212002221121 its reverse (121122200212102), we get a palindrome (322334202433223).

The spelling of 201212002221121 in words is "two hundred one trillion, two hundred twelve billion, two million, two hundred twenty-one thousand, one hundred twenty-one".