201120121221 has 8 divisors (see below), whose sum is σ = 268166510304. Its totient is φ = 134076906480.

The previous prime is 201120121219. The next prime is 201120121291. The reversal of 201120121221 is 122121021102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201120121221 - 2¹ = 201120121219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201120121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201120121211) 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, 641590 + ... + 902151.

It is an arithmetic number, because the mean of its divisors is an integer number (33520813788).

Almost surely, 2^201120121221 is an apocalyptic number.

It is an amenable number.

201120121221 is a deficient number, since it is larger than the sum of its proper divisors (67046389083).

201120121221 is a wasteful number, since it uses less digits than its factorization.

201120121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587171.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201120121221 its reverse (122121021102), we get a palindrome (323241142323).

The spelling of 201120121221 in words is "two hundred one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".