1220202120311 has 4 divisors (see below), whose sum is σ = 1220204919624. Its totient is φ = 1220199321000.

The previous prime is 1220202120283. The next prime is 1220202120317. The reversal of 1220202120311 is 1130212020221.

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 1220202120311 - 2¹⁸ = 1220201858167 is a prime.

It is a super-2 number, since 2×1220202120311² (a number of 25 digits) contains 22 as substring.

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 1220202120311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220202120317) 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, 589505 + ... + 1669706.

It is an arithmetic number, because the mean of its divisors is an integer number (305051229906).

Almost surely, 2^{1220202120311} is an apocalyptic number.

1220202120311 is a deficient number, since it is larger than the sum of its proper divisors (2799313).

1220202120311 is an equidigital number, since it uses as much as digits as its factorization.

1220202120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799312.

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

Adding to 1220202120311 its reverse (1130212020221), we get a palindrome (2350414140532).

The spelling of 1220202120311 in words is "one trillion, two hundred twenty billion, two hundred two million, one hundred twenty thousand, three hundred eleven".