21012030231200 has 72 divisors (see below), whose sum is σ = 51321941552700. Its totient is φ = 8400499097600.

The previous prime is 21012030231191. The next prime is 21012030231209. The reversal of 21012030231200 is 213203021012.

21012030231200 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21012030231191) and next prime (21012030231209).

It can be written as a sum of positive squares in 6 ways, for example, as 4460054029456 + 16551976201744 = 2111884^2 + 4068412^2 .

It is not an unprimeable number, because it can be changed into a prime (21012030231209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5178881 + ... + 8297280.

Almost surely, 2^{21012030231200} is an apocalyptic number.

21012030231200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012030231200 is an abundant number, since it is smaller than the sum of its proper divisors (30309911321500).

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

21012030231200 is a wasteful number, since it uses less digits than its factorization.

21012030231200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13478130 (or 13478117 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012030231200 its reverse (213203021012), we get a palindrome (21225233252212).

The spelling of 21012030231200 in words is "twenty-one trillion, twelve billion, thirty million, two hundred thirty-one thousand, two hundred".