12211204050 has 108 divisors (see below), whose sum is σ = 34625481930. Its totient is φ = 3084894720.

The previous prime is 12211204039. The next prime is 12211204123. The reversal of 12211204050 is 5040211221.

It can be written as a sum of positive squares in 3 ways, for example, as 9757685961 + 2453518089 = 98781^2 + 49533^2 .

It is a super-2 number, since 2×12211204050² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 124866 + ... + 200034.

Almost surely, 2^12211204050 is an apocalyptic number.

12211204050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211204050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17312740965).

12211204050 is an abundant number, since it is smaller than the sum of its proper divisors (22414277880).

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

12211204050 is a wasteful number, since it uses less digits than its factorization.

12211204050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75225 (or 75198 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 12211204050 its reverse (5040211221), we get a palindrome (17251415271).

The spelling of 12211204050 in words is "twelve billion, two hundred eleven million, two hundred four thousand, fifty".