11222120001221 has 8 divisors (see below), whose sum is σ = 11325439503840. Its totient is φ = 11118807121968.

The previous prime is 11222120001179. The next prime is 11222120001227. The reversal of 11222120001221 is 12210002122211.

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 11222120001221 - 2¹⁰ = 11222120000197 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 11222120001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222120001227) 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, 1781090 + ... + 5061276.

It is an arithmetic number, because the mean of its divisors is an integer number (1415679937980).

Almost surely, 2^{11222120001221} is an apocalyptic number.

It is an amenable number.

11222120001221 is a deficient number, since it is larger than the sum of its proper divisors (103319502619).

11222120001221 is a wasteful number, since it uses less digits than its factorization.

11222120001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311683.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11222120001221 its reverse (12210002122211), we get a palindrome (23432122123432).

The spelling of 11222120001221 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty million, one thousand, two hundred twenty-one".