11111231302220 has 96 divisors (see below), whose sum is σ = 27828951929856. Its totient is φ = 3643596000000.

The previous prime is 11111231302201. The next prime is 11111231302273. The reversal of 11111231302220 is 2220313211111.

It is a super-2 number, since 2×11111231302220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11111231302192 and 11111231302201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36074870 + ... + 36381570.

It is an arithmetic number, because the mean of its divisors is an integer number (289884915936).

Almost surely, 2^{11111231302220} is an apocalyptic number.

11111231302220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111231302220 is an abundant number, since it is smaller than the sum of its proper divisors (16717720627636).

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

11111231302220 is a wasteful number, since it uses less digits than its factorization.

11111231302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317991 (or 317989 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11111231302220 its reverse (2220313211111), we get a palindrome (13331544513331).

The spelling of 11111231302220 in words is "eleven trillion, one hundred eleven billion, two hundred thirty-one million, three hundred two thousand, two hundred twenty".