1220021202311 has 4 divisors (see below), whose sum is σ = 1220032279752. Its totient is φ = 1220010124872.

The previous prime is 1220021202289. The next prime is 1220021202329. The reversal of 1220021202311 is 1132021200221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220021202311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220021202311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021202341) 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, 5371841 + ... + 5594346.

It is an arithmetic number, because the mean of its divisors is an integer number (305008069938).

Almost surely, 2^{1220021202311} is an apocalyptic number.

1220021202311 is a deficient number, since it is larger than the sum of its proper divisors (11077441).

1220021202311 is a wasteful number, since it uses less digits than its factorization.

1220021202311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077440.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1220021202311 its reverse (1132021200221), we get a palindrome (2352042402532).

The spelling of 1220021202311 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred two thousand, three hundred eleven".