11211100120 has 48 divisors (see below), whose sum is σ = 27726637680. Its totient is φ = 4076761920.

The previous prime is 11211100097. The next prime is 11211100141. The reversal of 11211100120 is 2100111211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11211100097 and 11211100106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153332 + ... + 1163011.

It is an arithmetic number, because the mean of its divisors is an integer number (577638285).

Almost surely, 2^11211100120 is an apocalyptic number.

11211100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211100120 is an abundant number, since it is smaller than the sum of its proper divisors (16515537560).

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

11211100120 is a wasteful number, since it uses less digits than its factorization.

11211100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316376 (or 2316361 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11211100120 its reverse (2100111211), we get a palindrome (13311211331).

The spelling of 11211100120 in words is "eleven billion, two hundred eleven million, one hundred thousand, one hundred twenty".