11222220211220 has 48 divisors (see below), whose sum is σ = 24955286222160. Its totient is φ = 4224438042624.

The previous prime is 11222220211117. The next prime is 11222220211273. The reversal of 11222220211220 is 2211202222211.

It can be written as a sum of positive squares in 8 ways, for example, as 1211311555216 + 10010908656004 = 1100596^2 + 3164002^2 .

It is a super-2 number, since 2×11222220211220² (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 = 11222220211192 and 11222220211201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2074796 + ... + 5171964.

It is an arithmetic number, because the mean of its divisors is an integer number (519901796295).

Almost surely, 2^{11222220211220} is an apocalyptic number.

11222220211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222220211220 is an abundant number, since it is smaller than the sum of its proper divisors (13733066010940).

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

11222220211220 is a wasteful number, since it uses less digits than its factorization.

11222220211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107852 (or 3107850 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11222220211220 its reverse (2211202222211), we get a palindrome (13433422433431).

The spelling of 11222220211220 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, two hundred twenty".