21201353143 has 8 divisors (see below), whose sum is σ = 21799562400. Its totient is φ = 20610484128.

The previous prime is 21201353083. The next prime is 21201353153. The reversal of 21201353143 is 34135310212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21201353143 - 2³³ = 12611418551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201353153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829203 + ... + 1840756.

It is an arithmetic number, because the mean of its divisors is an integer number (2724945300).

Almost surely, 2^21201353143 is an apocalyptic number.

21201353143 is a deficient number, since it is larger than the sum of its proper divisors (598209257).

21201353143 is a wasteful number, since it uses less digits than its factorization.

21201353143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670121.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21201353143 its reverse (34135310212), we get a palindrome (55336663355).

The spelling of 21201353143 in words is "twenty-one billion, two hundred one million, three hundred fifty-three thousand, one hundred forty-three".