12201001918 has 16 divisors (see below), whose sum is σ = 20917601280. Its totient is φ = 5228601336.

The previous prime is 12201001907. The next prime is 12201001919. The reversal of 12201001918 is 81910010221.

It is a junction number, because it is equal to n+sod(n) for n = 12201001892 and 12201001901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201001919) 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, 226303 + ... + 274981.

It is an arithmetic number, because the mean of its divisors is an integer number (1307350080).

Almost surely, 2^12201001918 is an apocalyptic number.

12201001918 is a deficient number, since it is larger than the sum of its proper divisors (8716599362).

12201001918 is a wasteful number, since it uses less digits than its factorization.

12201001918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66591.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 12201001918 in words is "twelve billion, two hundred one million, one thousand, nine hundred eighteen".