12021201600 has 84 divisors (see below), whose sum is σ = 39439574664. Its totient is φ = 3205652480.

The previous prime is 12021201587. The next prime is 12021201641. The reversal of 12021201600 is 610212021.

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 12021201600.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1247409 + ... + 1257008.

It is an arithmetic number, because the mean of its divisors is an integer number (469518746).

Almost surely, 2^12021201600 is an apocalyptic number.

12021201600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021201600 is an abundant number, since it is smaller than the sum of its proper divisors (27418373064).

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

12021201600 is a wasteful number, since it uses less digits than its factorization.

12021201600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504442 (or 2504427 counting only the distinct ones).

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

Adding to 12021201600 its reverse (610212021), we get a palindrome (12631413621).

The spelling of 12021201600 in words is "twelve billion, twenty-one million, two hundred one thousand, six hundred".