11111111320220 has 12 divisors (see below), whose sum is σ = 23333333772504. Its totient is φ = 4444444528080.

The previous prime is 11111111320181. The next prime is 11111111320229. The reversal of 11111111320220 is 2202311111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111111320229) 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, 277777782986 + ... + 277777783025.

It is an arithmetic number, because the mean of its divisors is an integer number (1944444481042).

Almost surely, 2^{11111111320220} is an apocalyptic number.

11111111320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111111320220 is an abundant number, since it is smaller than the sum of its proper divisors (12222222452284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111111320220 is a wasteful number, since it uses less digits than its factorization.

11111111320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555555566020 (or 555555566018 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 11111111320220 its reverse (2202311111111), we get a palindrome (13313422431331).

The spelling of 11111111320220 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, three hundred twenty thousand, two hundred twenty".