21212103120211 has 8 divisors (see below), whose sum is σ = 21893594927040. Its totient is φ = 20541343468008.

The previous prime is 21212103120181. The next prime is 21212103120223. The reversal of 21212103120211 is 11202130121212.

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 21212103120211 - 2²³ = 21212094731603 is a prime.

It is a super-3 number, since 3×21212103120211³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212103120251) 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, 2683034641 + ... + 2683042546.

It is an arithmetic number, because the mean of its divisors is an integer number (2736699365880).

Almost surely, 2^{21212103120211} is an apocalyptic number.

21212103120211 is a deficient number, since it is larger than the sum of its proper divisors (681491806829).

21212103120211 is an equidigital number, since it uses as much as digits as its factorization.

21212103120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5366077313.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21212103120211 its reverse (11202130121212), we get a palindrome (32414233241423).

The spelling of 21212103120211 in words is "twenty-one trillion, two hundred twelve billion, one hundred three million, one hundred twenty thousand, two hundred eleven".