1220221110111 has 8 divisors (see below), whose sum is σ = 1626968167344. Its totient is φ = 813477396480.

The previous prime is 1220221110041. The next prime is 1220221110139. The reversal of 1220221110111 is 1110111220221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220221110111 - 2²¹ = 1220219012959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221110161) 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, 198495 + ... + 1574751.

It is an arithmetic number, because the mean of its divisors is an integer number (203371020918).

Almost surely, 2^{1220221110111} is an apocalyptic number.

1220221110111 is a deficient number, since it is larger than the sum of its proper divisors (406747057233).

1220221110111 is a wasteful number, since it uses less digits than its factorization.

1220221110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671801.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1220221110111 its reverse (1110111220221), we get a palindrome (2330332330332).

The spelling of 1220221110111 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred ten thousand, one hundred eleven".