21020211022201 has 8 divisors (see below), whose sum is σ = 21078988136640. Its totient is φ = 20961435158448.

The previous prime is 21020211022199. The next prime is 21020211022333. The reversal of 21020211022201 is 10222011202012.

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 21020211022201 - 2¹ = 21020211022199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020211029201) 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, 40942650 + ... + 41452876.

It is an arithmetic number, because the mean of its divisors is an integer number (2634873517080).

Almost surely, 2^{21020211022201} is an apocalyptic number.

It is an amenable number.

21020211022201 is a deficient number, since it is larger than the sum of its proper divisors (58777114439).

21020211022201 is a wasteful number, since it uses less digits than its factorization.

21020211022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625343.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21020211022201 its reverse (10222011202012), we get a palindrome (31242222224213).

The spelling of 21020211022201 in words is "twenty-one trillion, twenty billion, two hundred eleven million, twenty-two thousand, two hundred one".