12211203120 has 80 divisors (see below), whose sum is σ = 37884881760. Its totient is φ = 3253727232.

The previous prime is 12211203091. The next prime is 12211203131. The reversal of 12211203120 is 2130211221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12211203120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12211203120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291666 + ... + 330894.

It is an arithmetic number, because the mean of its divisors is an integer number (473561022).

Almost surely, 2^12211203120 is an apocalyptic number.

12211203120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211203120 is an abundant number, since it is smaller than the sum of its proper divisors (25673678640).

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

12211203120 is a wasteful number, since it uses less digits than its factorization.

12211203120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40542 (or 40536 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12211203120 its reverse (2130211221), we get a palindrome (14341414341).

The spelling of 12211203120 in words is "twelve billion, two hundred eleven million, two hundred three thousand, one hundred twenty".