11212120212220 has 12 divisors (see below), whose sum is σ = 23545452445704. Its totient is φ = 4484848084880.

The previous prime is 11212120212211. The next prime is 11212120212229. The reversal of 11212120212220 is 2221202121211.

It is an interprime number because it is at equal distance from previous prime (11212120212211) and next prime (11212120212229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212120212229) 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, 280303005286 + ... + 280303005325.

It is an arithmetic number, because the mean of its divisors is an integer number (1962121037142).

Almost surely, 2^{11212120212220} is an apocalyptic number.

11212120212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212120212220 is an abundant number, since it is smaller than the sum of its proper divisors (12333332233484).

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

11212120212220 is a wasteful number, since it uses less digits than its factorization.

11212120212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560606010620 (or 560606010618 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11212120212220 its reverse (2221202121211), we get a palindrome (13433322333431).

The spelling of 11212120212220 in words is "eleven trillion, two hundred twelve billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty".