1220122213311 has 4 divisors (see below), whose sum is σ = 1626829617752. Its totient is φ = 813414808872.

The previous prime is 1220122213307. The next prime is 1220122213319. The reversal of 1220122213311 is 1133122210221.

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

It is not a de Polignac number, because 1220122213311 - 2² = 1220122213307 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 (1220122213319) 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, 203353702216 + ... + 203353702221.

It is an arithmetic number, because the mean of its divisors is an integer number (406707404438).

Almost surely, 2^{1220122213311} is an apocalyptic number.

1220122213311 is a deficient number, since it is larger than the sum of its proper divisors (406707404441).

1220122213311 is an equidigital number, since it uses as much as digits as its factorization.

1220122213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406707404440.

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

Adding to 1220122213311 its reverse (1133122210221), we get a palindrome (2353244423532).

The spelling of 1220122213311 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred thirteen thousand, three hundred eleven".