201121012219 has 4 divisors (see below), whose sum is σ = 201122397280. Its totient is φ = 201119627160.

The previous prime is 201121012177. The next prime is 201121012229. The reversal of 201121012219 is 912210121102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201121012219 - 2²³ = 201112623611 is a prime.

It is a super-2 number, since 2×201121012219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121012219.

It is not an unprimeable number, because it can be changed into a prime (201121012229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445299 + ... + 774940.

It is an arithmetic number, because the mean of its divisors is an integer number (50280599320).

Almost surely, 2^201121012219 is an apocalyptic number.

201121012219 is a deficient number, since it is larger than the sum of its proper divisors (1385061).

201121012219 is a wasteful number, since it uses less digits than its factorization.

201121012219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385060.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 201121012219 in words is "two hundred one billion, one hundred twenty-one million, twelve thousand, two hundred nineteen".