11110000001221 has 8 divisors (see below), whose sum is σ = 12318688526688. Its totient is φ = 9934426230000.

The previous prime is 11110000001209. The next prime is 11110000001231. The reversal of 11110000001221 is 12210000001111.

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 11110000001221 - 2³³ = 11101410066629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11110000001198 and 11110000001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110000001231) 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, 8278687855 + ... + 8278689196.

It is an arithmetic number, because the mean of its divisors is an integer number (1539836065836).

Almost surely, 2^{11110000001221} is an apocalyptic number.

11110000001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11110000001221 is a deficient number, since it is larger than the sum of its proper divisors (1208688525467).

11110000001221 is a wasteful number, since it uses less digits than its factorization.

11110000001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16557377123.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11110000001221 its reverse (12210000001111), we get a palindrome (23320000002332).

The spelling of 11110000001221 in words is "eleven trillion, one hundred ten billion, one thousand, two hundred twenty-one".