1201121201109 has 4 divisors (see below), whose sum is σ = 1601494934816. Its totient is φ = 800747467404.

The previous prime is 1201121201101. The next prime is 1201121201143. The reversal of 1201121201109 is 9011021211021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1201121201109 - 2³ = 1201121201101 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 (1201121201101) 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, 200186866849 + ... + 200186866854.

It is an arithmetic number, because the mean of its divisors is an integer number (400373733704).

Almost surely, 2^{1201121201109} is an apocalyptic number.

It is an amenable number.

1201121201109 is a deficient number, since it is larger than the sum of its proper divisors (400373733707).

1201121201109 is an equidigital number, since it uses as much as digits as its factorization.

1201121201109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400373733706.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1201121201109 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred one thousand, one hundred nine".