1101211121209 has 8 divisors (see below), whose sum is σ = 1167139289160. Its totient is φ = 1035410846976.

The previous prime is 1101211121203. The next prime is 1101211121251. The reversal of 1101211121209 is 9021211121011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59464285609 + 1041746835600 = 243853^2 + 1020660^2 .

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 1101211121209 - 2³ = 1101211121201 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 1101211121209.

It is not an unprimeable number, because it can be changed into a prime (1101211121201) 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, 31955694 + ... + 31990135.

It is an arithmetic number, because the mean of its divisors is an integer number (145892411145).

Almost surely, 2^{1101211121209} is an apocalyptic number.

It is an amenable number.

1101211121209 is a deficient number, since it is larger than the sum of its proper divisors (65928167951).

1101211121209 is a wasteful number, since it uses less digits than its factorization.

1101211121209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63946859.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1101211121209 in words is "one trillion, one hundred one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred nine".