11101212221020 has 12 divisors (see below), whose sum is σ = 23312545664184. Its totient is φ = 4440484888400.

The previous prime is 11101212220997. The next prime is 11101212221039. The reversal of 11101212221020 is 2012221210111.

It is a super-2 number, since 2×11101212221020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11101212220985 and 11101212221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277530305506 + ... + 277530305545.

It is an arithmetic number, because the mean of its divisors is an integer number (1942712138682).

Almost surely, 2^{11101212221020} is an apocalyptic number.

11101212221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101212221020 is an abundant number, since it is smaller than the sum of its proper divisors (12211333443164).

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

11101212221020 is a wasteful number, since it uses less digits than its factorization.

11101212221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555060611060 (or 555060611058 counting only the distinct ones).

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

Adding to 11101212221020 its reverse (2012221210111), we get a palindrome (13113433431131).

The spelling of 11101212221020 in words is "eleven trillion, one hundred one billion, two hundred twelve million, two hundred twenty-one thousand, twenty".