201201221109 has 16 divisors (see below), whose sum is σ = 306598712832. Its totient is φ = 114969735408.

The previous prime is 201201221093. The next prime is 201201221113. The reversal of 201201221109 is 901122102102.

It is not a de Polignac number, because 201201221109 - 2⁴ = 201201221093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201221119) 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, 1643662 + ... + 1761824.

It is an arithmetic number, because the mean of its divisors is an integer number (19162419552).

Almost surely, 2^201201221109 is an apocalyptic number.

It is an amenable number.

201201221109 is a deficient number, since it is larger than the sum of its proper divisors (105397491723).

201201221109 is a wasteful number, since it uses less digits than its factorization.

201201221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199256.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 201201221109 in words is "two hundred one billion, two hundred one million, two hundred twenty-one thousand, one hundred nine".