12205202040 has 128 divisors (see below), whose sum is σ = 40713192000. Its totient is φ = 3252386304.

The previous prime is 12205202033. The next prime is 12205202047. The reversal of 12205202040 is 4020250221.

12205202040 is a `hidden beast` number, since 122 + 0 + 520 + 20 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12205202033) and next prime (12205202047).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205202047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1928962 + ... + 1935278.

Almost surely, 2^12205202040 is an apocalyptic number.

12205202040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12205202040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20356596000).

12205202040 is an abundant number, since it is smaller than the sum of its proper divisors (28507989960).

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

12205202040 is a wasteful number, since it uses less digits than its factorization.

12205202040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 12205202040 its reverse (4020250221), we get a palindrome (16225452261).

The spelling of 12205202040 in words is "twelve billion, two hundred five million, two hundred two thousand, forty".