21012020020211 has 16 divisors (see below), whose sum is σ = 23539954403328. Its totient is φ = 18590251528800.

The previous prime is 21012020020141. The next prime is 21012020020331. The reversal of 21012020020211 is 11202002021012.

It is a cyclic number.

It is not a de Polignac number, because 21012020020211 - 2¹⁴ = 21012020003827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012020025211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80054675 + ... + 80316716.

It is an arithmetic number, because the mean of its divisors is an integer number (1471247150208).

Almost surely, 2^{21012020020211} is an apocalyptic number.

21012020020211 is a deficient number, since it is larger than the sum of its proper divisors (2527934383117).

21012020020211 is a wasteful number, since it uses less digits than its factorization.

21012020020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160371722.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012020020211 its reverse (11202002021012), we get a palindrome (32214022041223).

The spelling of 21012020020211 in words is "twenty-one trillion, twelve billion, twenty million, twenty thousand, two hundred eleven".