21102121010211 has 8 divisors (see below), whose sum is σ = 28198825405200. Its totient is φ = 14036748644352.

The previous prime is 21102121010197. The next prime is 21102121010251. The reversal of 21102121010211 is 11201012120112.

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 21102121010211 - 2¹⁰ = 21102121009187 is a prime.

It is a super-2 number, since 2×21102121010211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21102121010251) 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, 7833005710 + ... + 7833008403.

It is an arithmetic number, because the mean of its divisors is an integer number (3524853175650).

Almost surely, 2^{21102121010211} is an apocalyptic number.

21102121010211 is a deficient number, since it is larger than the sum of its proper divisors (7096704394989).

21102121010211 is a wasteful number, since it uses less digits than its factorization.

21102121010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15666014565.

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

Adding to 21102121010211 its reverse (11201012120112), we get a palindrome (32303133130323).

The spelling of 21102121010211 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-one million, ten thousand, two hundred eleven".