21011121200211 has 8 divisors (see below), whose sum is σ = 28015589500560. Its totient is φ = 14007033516672.

The previous prime is 21011121200183. The next prime is 21011121200227. The reversal of 21011121200211 is 11200212111012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21011121200211 - 2²¹ = 21011119103059 is a prime.

It is a super-2 number, since 2×21011121200211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011121250211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95025370 + ... + 95246223.

It is an arithmetic number, because the mean of its divisors is an integer number (3501948687570).

Almost surely, 2^{21011121200211} is an apocalyptic number.

21011121200211 is a deficient number, since it is larger than the sum of its proper divisors (7004468300349).

21011121200211 is a wasteful number, since it uses less digits than its factorization.

21011121200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190308405.

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

Adding to 21011121200211 its reverse (11200212111012), we get a palindrome (32211333311223).

The spelling of 21011121200211 in words is "twenty-one trillion, eleven billion, one hundred twenty-one million, two hundred thousand, two hundred eleven".