1222220220011 has 4 divisors (see below), whose sum is σ = 1396823108592. Its totient is φ = 1047617331432.

The previous prime is 1222220220007. The next prime is 1222220220043. The reversal of 1222220220011 is 1100220222221.

It is a happy number.

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

It is not a de Polignac number, because 1222220220011 - 2² = 1222220220007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222220220061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87301444280 + ... + 87301444293.

It is an arithmetic number, because the mean of its divisors is an integer number (349205777148).

Almost surely, 2^{1222220220011} is an apocalyptic number.

1222220220011 is a deficient number, since it is larger than the sum of its proper divisors (174602888581).

1222220220011 is an equidigital number, since it uses as much as digits as its factorization.

1222220220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174602888580.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1222220220011 its reverse (1100220222221), we get a palindrome (2322440442232).

The spelling of 1222220220011 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, eleven".