1209110109121 has 8 divisors (see below), whose sum is σ = 1237244522624. Its totient is φ = 1180976403600.

The previous prime is 1209110109083. The next prime is 1209110109127. The reversal of 1209110109121 is 1219010119021.

It is a happy number.

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 1209110109121 - 2²⁵ = 1209076554689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1209110109121.

It is not an unprimeable number, because it can be changed into a prime (1209110109127) 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, 5060296 + ... + 5293846.

It is an arithmetic number, because the mean of its divisors is an integer number (154655565328).

Almost surely, 2^{1209110109121} is an apocalyptic number.

It is an amenable number.

1209110109121 is a deficient number, since it is larger than the sum of its proper divisors (28134413503).

1209110109121 is a wasteful number, since it uses less digits than its factorization.

1209110109121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353991.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 1209110109121 in words is "one trillion, two hundred nine billion, one hundred ten million, one hundred nine thousand, one hundred twenty-one".