11211220120 has 32 divisors (see below), whose sum is σ = 25652797200. Its totient is φ = 4408478848.

The previous prime is 11211220109. The next prime is 11211220147. The reversal of 11211220120 is 2102211211.

It is a self number, because there is not a number n which added to its sum of digits gives 11211220120.

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, 2372899 + ... + 2377618.

Almost surely, 2^11211220120 is an apocalyptic number.

11211220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211220120 is an abundant number, since it is smaller than the sum of its proper divisors (14441577080).

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

11211220120 is a wasteful number, since it uses less digits than its factorization.

11211220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750587 (or 4750583 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11211220120 its reverse (2102211211), we get a palindrome (13313431331).

The spelling of 11211220120 in words is "eleven billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty".