1201220221109 has 8 divisors (see below), whose sum is σ = 1214893245720. Its totient is φ = 1187595426816.

The previous prime is 1201220221063. The next prime is 1201220221141. The reversal of 1201220221109 is 9011220221021.

It can be written as a sum of positive squares in 4 ways, for example, as 702741860209 + 498478360900 = 838297^2 + 706030^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1201220221109 - 2¹⁶ = 1201220155573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201220221609) 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, 12007484 + ... + 12107109.

It is an arithmetic number, because the mean of its divisors is an integer number (151861655715).

Almost surely, 2^{1201220221109} is an apocalyptic number.

It is an amenable number.

1201220221109 is a deficient number, since it is larger than the sum of its proper divisors (13673024611).

1201220221109 is a wasteful number, since it uses less digits than its factorization.

1201220221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24115159.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1201220221109 in words is "one trillion, two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred nine".