21143341100 has 144 divisors (see below), whose sum is σ = 54813158400. Its totient is φ = 6921573120.

The previous prime is 21143341097. The next prime is 21143341103. The reversal of 21143341100 is 114334112.

It is an interprime number because it is at equal distance from previous prime (21143341097) and next prime (21143341103).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21143341103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14795186 + ... + 14796614.

Almost surely, 2^21143341100 is an apocalyptic number.

21143341100 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 21143341100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27406579200).

21143341100 is an abundant number, since it is smaller than the sum of its proper divisors (33669817300).

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

21143341100 is a wasteful number, since it uses less digits than its factorization.

21143341100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392 (or 2385 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21143341100 its reverse (114334112), we get a palindrome (21257675212).

The spelling of 21143341100 in words is "twenty-one billion, one hundred forty-three million, three hundred forty-one thousand, one hundred".