21143441202 has 64 divisors (see below), whose sum is σ = 46126958976. Its totient is φ = 6422169600.

The previous prime is 21143441201. The next prime is 21143441227. The reversal of 21143441202 is 20214434112.

It is not an unprimeable number, because it can be changed into a prime (21143441201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2777133 + ... + 2784735.

It is an arithmetic number, because the mean of its divisors is an integer number (720733734).

Almost surely, 2^21143441202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21143441202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23063479488).

21143441202 is an abundant number, since it is smaller than the sum of its proper divisors (24983517774).

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

21143441202 is a wasteful number, since it uses less digits than its factorization.

21143441202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21143441202 its reverse (20214434112), we get a palindrome (41357875314).

The spelling of 21143441202 in words is "twenty-one billion, one hundred forty-three million, four hundred forty-one thousand, two hundred two".