1220331222111 has 4 divisors (see below), whose sum is σ = 1627108296152. Its totient is φ = 813554148072.

The previous prime is 1220331222091. The next prime is 1220331222113. The reversal of 1220331222111 is 1112221330221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220331222111 - 2¹¹ = 1220331220063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220331222113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203388537016 + ... + 203388537021.

It is an arithmetic number, because the mean of its divisors is an integer number (406777074038).

Almost surely, 2^{1220331222111} is an apocalyptic number.

1220331222111 is a deficient number, since it is larger than the sum of its proper divisors (406777074041).

1220331222111 is an equidigital number, since it uses as much as digits as its factorization.

1220331222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406777074040.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1220331222111 its reverse (1112221330221), we get a palindrome (2332552552332).

The spelling of 1220331222111 in words is "one trillion, two hundred twenty billion, three hundred thirty-one million, two hundred twenty-two thousand, one hundred eleven".