1220231103211 has 4 divisors (see below), whose sum is σ = 1226362918000. Its totient is φ = 1214099288424.

The previous prime is 1220231103209. The next prime is 1220231103227. The reversal of 1220231103211 is 1123011320221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220231103211 - 2¹ = 1220231103209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220231103241) 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, 3065907096 + ... + 3065907493.

It is an arithmetic number, because the mean of its divisors is an integer number (306590729500).

Almost surely, 2^{1220231103211} is an apocalyptic number.

1220231103211 is a deficient number, since it is larger than the sum of its proper divisors (6131814789).

1220231103211 is an equidigital number, since it uses as much as digits as its factorization.

1220231103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131814788.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1220231103211 its reverse (1123011320221), we get a palindrome (2343242423432).

The spelling of 1220231103211 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, one hundred three thousand, two hundred eleven".