201120021221 has 16 divisors (see below), whose sum is σ = 238517616000. Its totient is φ = 169466732064.

The previous prime is 201120021217. The next prime is 201120021331. The reversal of 201120021221 is 122120021102.

It is not a de Polignac number, because 201120021221 - 2² = 201120021217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201120021196 and 201120021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201120021121) 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, 4948880 + ... + 4989353.

It is an arithmetic number, because the mean of its divisors is an integer number (14907351000).

Almost surely, 2^201120021221 is an apocalyptic number.

It is an amenable number.

201120021221 is a deficient number, since it is larger than the sum of its proper divisors (37397594779).

201120021221 is an frugal number, since it uses more digits than its factorization.

201120021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938313 (or 9938299 counting only the distinct ones).

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

Adding to 201120021221 its reverse (122120021102), we get a palindrome (323240042323).

The spelling of 201120021221 in words is "two hundred one billion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".