1110221121221 has 32 divisors (see below), whose sum is σ = 1139556781440. Its totient is φ = 1081404979200.

The previous prime is 1110221121197. The next prime is 1110221121223. The reversal of 1110221121221 is 1221211220111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110221121221 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 1110221121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110221121223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1872210701 + ... + 1872211293.

It is an arithmetic number, because the mean of its divisors is an integer number (35611149420).

Almost surely, 2^{1110221121221} is an apocalyptic number.

It is an amenable number.

1110221121221 is a deficient number, since it is larger than the sum of its proper divisors (29335660219).

1110221121221 is a wasteful number, since it uses less digits than its factorization.

1110221121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1110221121221 its reverse (1221211220111), we get a palindrome (2331432341332).

The spelling of 1110221121221 in words is "one trillion, one hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".