21000120110211 has 16 divisors (see below), whose sum is σ = 30545740581120. Its totient is φ = 12727299133920.

The previous prime is 21000120110209. The next prime is 21000120110213. The reversal of 21000120110211 is 11201102100012.

It is an interprime number because it is at equal distance from previous prime (21000120110209) and next prime (21000120110213).

It is not a de Polignac number, because 21000120110211 - 2¹ = 21000120110209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000120110213) 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, 9491941 + ... + 11493353.

It is an arithmetic number, because the mean of its divisors is an integer number (1909108786320).

Almost surely, 2^{21000120110211} is an apocalyptic number.

21000120110211 is a deficient number, since it is larger than the sum of its proper divisors (9545620470909).

21000120110211 is a wasteful number, since it uses less digits than its factorization.

21000120110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319386.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21000120110211 its reverse (11201102100012), we get a palindrome (32201222210223).

The spelling of 21000120110211 in words is "twenty-one trillion, one hundred twenty million, one hundred ten thousand, two hundred eleven".