21000120020211 has 8 divisors (see below), whose sum is σ = 28065125597184. Its totient is φ = 13967597228360.

The previous prime is 21000120020137. The next prime is 21000120020219. The reversal of 21000120020211 is 11202002100012.

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 21000120020211 - 2¹³ = 21000120012019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000120020219) 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, 8120694771 + ... + 8120697356.

It is an arithmetic number, because the mean of its divisors is an integer number (3508140699648).

Almost surely, 2^{21000120020211} is an apocalyptic number.

21000120020211 is a deficient number, since it is larger than the sum of its proper divisors (7065005576973).

21000120020211 is a wasteful number, since it uses less digits than its factorization.

21000120020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16241392561.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000120020211 its reverse (11202002100012), we get a palindrome (32202122120223).

The spelling of 21000120020211 in words is "twenty-one trillion, one hundred twenty million, twenty thousand, two hundred eleven".