11011211220220 has 48 divisors (see below), whose sum is σ = 23661722367360. Its totient is φ = 4301977893696.

The previous prime is 11011211220143. The next prime is 11011211220277. The reversal of 11011211220220 is 2202211211011.

It is a junction number, because it is equal to n+sod(n) for n = 11011211220194 and 11011211220203.

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, 85043491 + ... + 85172869.

It is an arithmetic number, because the mean of its divisors is an integer number (492952549320).

Almost surely, 2^{11011211220220} is an apocalyptic number.

11011211220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011211220220 is an abundant number, since it is smaller than the sum of its proper divisors (12650511147140).

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

11011211220220 is a wasteful number, since it uses less digits than its factorization.

11011211220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228394 (or 228392 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11011211220220 its reverse (2202211211011), we get a palindrome (13213422431231).

The spelling of 11011211220220 in words is "eleven trillion, eleven billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty".