12205100040 has 64 divisors (see below), whose sum is σ = 41846060160. Its totient is φ = 2789736960.

The previous prime is 12205100021. The next prime is 12205100057. The reversal of 12205100040 is 4000150221.

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

It is a junction number, because it is equal to n+sod(n) for n = 12205099992 and 12205100019.

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, 7264101 + ... + 7265780.

It is an arithmetic number, because the mean of its divisors is an integer number (653844690).

Almost surely, 2^12205100040 is an apocalyptic number.

12205100040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205100040 is an abundant number, since it is smaller than the sum of its proper divisors (29640960120).

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

12205100040 is a wasteful number, since it uses less digits than its factorization.

12205100040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14529902 (or 14529898 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 12205100040 its reverse (4000150221), we get a palindrome (16205250261).

The spelling of 12205100040 in words is "twelve billion, two hundred five million, one hundred thousand, forty".