21121110200211 has 16 divisors (see below), whose sum is σ = 32485339056384. Its totient is φ = 11956409511264.

The previous prime is 21121110200209. The next prime is 21121110200213. The reversal of 21121110200211 is 11200201112112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21121110200209) and next prime (21121110200213).

It is not a de Polignac number, because 21121110200211 - 2¹ = 21121110200209 is a prime.

It is a super-2 number, since 2×21121110200211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121110200213) 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, 4699844260 + ... + 4699848753.

It is an arithmetic number, because the mean of its divisors is an integer number (2030333691024).

Almost surely, 2^{21121110200211} is an apocalyptic number.

21121110200211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21121110200211 is a deficient number, since it is larger than the sum of its proper divisors (11364228856173).

21121110200211 is a wasteful number, since it uses less digits than its factorization.

21121110200211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399693130.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121110200211 its reverse (11200201112112), we get a palindrome (32321311312323).

The spelling of 21121110200211 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred thousand, two hundred eleven".