11101020121220 has 24 divisors (see below), whose sum is σ = 23337844764864. Its totient is φ = 4435512332256.

The previous prime is 11101020121201. The next prime is 11101020121237. The reversal of 11101020121220 is 2212102010111.

It is a junction number, because it is equal to n+sod(n) for n = 11101020121195 and 11101020121204.

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, 305963672 + ... + 305999951.

It is an arithmetic number, because the mean of its divisors is an integer number (972410198536).

Almost surely, 2^{11101020121220} is an apocalyptic number.

11101020121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101020121220 is an abundant number, since it is smaller than the sum of its proper divisors (12236824643644).

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

11101020121220 is a wasteful number, since it uses less digits than its factorization.

11101020121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611964539 (or 611964537 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11101020121220 its reverse (2212102010111), we get a palindrome (13313122131331).

The spelling of 11101020121220 in words is "eleven trillion, one hundred one billion, twenty million, one hundred twenty-one thousand, two hundred twenty".