220240212311 has 4 divisors (see below), whose sum is σ = 251703099792. Its totient is φ = 188777324832.

The previous prime is 220240212307. The next prime is 220240212317. The reversal of 220240212311 is 113212042022.

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 220240212311 - 2² = 220240212307 is a prime.

It is a super-2 number, since 2×220240212311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220240212317) 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, 15731443730 + ... + 15731443743.

It is an arithmetic number, because the mean of its divisors is an integer number (62925774948).

Almost surely, 2^220240212311 is an apocalyptic number.

220240212311 is a deficient number, since it is larger than the sum of its proper divisors (31462887481).

220240212311 is an equidigital number, since it uses as much as digits as its factorization.

220240212311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31462887480.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 220240212311 its reverse (113212042022), we get a palindrome (333452254333).

The spelling of 220240212311 in words is "two hundred twenty billion, two hundred forty million, two hundred twelve thousand, three hundred eleven".