11211212120 has 32 divisors (see below), whose sum is σ = 25237915200. Its totient is φ = 4482229248.

The previous prime is 11211212053. The next prime is 11211212123. The reversal of 11211212120 is 2121211211.

It is a junction number, because it is equal to n+sod(n) for n = 11211212095 and 11211212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211212123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11201 + ... + 150159.

It is an arithmetic number, because the mean of its divisors is an integer number (788684850).

Almost surely, 2^11211212120 is an apocalyptic number.

11211212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211212120 is an abundant number, since it is smaller than the sum of its proper divisors (14026703080).

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

11211212120 is a wasteful number, since it uses less digits than its factorization.

11211212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140987 (or 140983 counting only the distinct ones).

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

Adding to 11211212120 its reverse (2121211211), we get a palindrome (13332423331).

Subtracting from 11211212120 its reverse (2121211211), we obtain a palindrome (9090000909).

The spelling of 11211212120 in words is "eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty".