21031030301200 has 60 divisors (see below), whose sum is σ = 50974192446228. Its totient is φ = 8337965977600.

The previous prime is 21031030301137. The next prime is 21031030301201. The reversal of 21031030301200 is 210303013012.

It can be written as a sum of positive squares in 6 ways, for example, as 4305940405776 + 16725089895424 = 2075076^2 + 4089632^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21031030301201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232598941 + ... + 232689340.

Almost surely, 2^{21031030301200} is an apocalyptic number.

21031030301200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031030301200 is an abundant number, since it is smaller than the sum of its proper divisors (29943162145028).

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

21031030301200 is a wasteful number, since it uses less digits than its factorization.

21031030301200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465288412 (or 465288401 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21031030301200 its reverse (210303013012), we get a palindrome (21241333314212).

The spelling of 21031030301200 in words is "twenty-one trillion, thirty-one billion, thirty million, three hundred one thousand, two hundred".