11011212211220 has 24 divisors (see below), whose sum is σ = 24902279924424. Its totient is φ = 4065678354816.

The previous prime is 11011212211211. The next prime is 11011212211231. The reversal of 11011212211220 is 2211221211011.

It can be written as a sum of positive squares in 4 ways, for example, as 61347363856 + 10949864847364 = 247684^2 + 3309058^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21175407839 + ... + 21175408358.

It is an arithmetic number, because the mean of its divisors is an integer number (1037594996851).

Almost surely, 2^{11011212211220} is an apocalyptic number.

11011212211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011212211220 is an abundant number, since it is smaller than the sum of its proper divisors (13891067713204).

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

11011212211220 is a wasteful number, since it uses less digits than its factorization.

11011212211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42350816219 (or 42350816217 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11011212211220 its reverse (2211221211011), we get a palindrome (13222433422231).

The spelling of 11011212211220 in words is "eleven trillion, eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty".