21001341200 has 120 divisors (see below), whose sum is σ = 58840876800. Its totient is φ = 7200412800.

The previous prime is 21001341197. The next prime is 21001341203. The reversal of 21001341200 is 214310012.

It is an interprime number because it is at equal distance from previous prime (21001341197) and next prime (21001341203).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21001341203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60665 + ... + 213735.

It is an arithmetic number, because the mean of its divisors is an integer number (490340640).

Almost surely, 2^21001341200 is an apocalyptic number.

21001341200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21001341200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29420438400).

21001341200 is an abundant number, since it is smaller than the sum of its proper divisors (37839535600).

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

21001341200 is a wasteful number, since it uses less digits than its factorization.

21001341200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153110 (or 153085 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21001341200 its reverse (214310012), we get a palindrome (21215651212).

The spelling of 21001341200 in words is "twenty-one billion, one million, three hundred forty-one thousand, two hundred".