11211221109 has 8 divisors (see below), whose sum is σ = 16307230752. Its totient is φ = 6794679440.

The previous prime is 11211221101. The next prime is 11211221137. The reversal of 11211221109 is 90112211211.

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 11211221109 - 2³ = 11211221101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211221101) 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, 169866954 + ... + 169867019.

It is an arithmetic number, because the mean of its divisors is an integer number (2038403844).

Almost surely, 2^11211221109 is an apocalyptic number.

It is an amenable number.

11211221109 is a deficient number, since it is larger than the sum of its proper divisors (5096009643).

11211221109 is a wasteful number, since it uses less digits than its factorization.

11211221109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339733987.

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

The spelling of 11211221109 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred nine".