21752203020211 has 8 divisors (see below), whose sum is σ = 21902415008400. Its totient is φ = 21602138664288.

The previous prime is 21752203020173. The next prime is 21752203020221. The reversal of 21752203020211 is 11202030225712.

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 21752203020211 - 2⁷ = 21752203020083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21752203020211.

It is not an unprimeable number, because it can be changed into a prime (21752203020221) 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, 36612361 + ... + 37201738.

It is an arithmetic number, because the mean of its divisors is an integer number (2737801876050).

Almost surely, 2^{21752203020211} is an apocalyptic number.

21752203020211 is a deficient number, since it is larger than the sum of its proper divisors (150211988189).

21752203020211 is a wasteful number, since it uses less digits than its factorization.

21752203020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73816133.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21752203020211 its reverse (11202030225712), we get a palindrome (32954233245923).

The spelling of 21752203020211 in words is "twenty-one trillion, seven hundred fifty-two billion, two hundred three million, twenty thousand, two hundred eleven".