21101130121211 has 8 divisors (see below), whose sum is σ = 24182751594240. Its totient is φ = 18036302226408.

The previous prime is 21101130121187. The next prime is 21101130121213. The reversal of 21101130121211 is 11212103110112.

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 21101130121211 - 2³⁰ = 21100056379387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21101130121211.

It is not an unprimeable number, because it can be changed into a prime (21101130121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4198391861 + ... + 4198396886.

It is an arithmetic number, because the mean of its divisors is an integer number (3022843949280).

Almost surely, 2^{21101130121211} is an apocalyptic number.

21101130121211 is a deficient number, since it is larger than the sum of its proper divisors (3081621473029).

21101130121211 is an equidigital number, since it uses as much as digits as its factorization.

21101130121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8396789113.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 21101130121211 its reverse (11212103110112), we get a palindrome (32313233231323).

The spelling of 21101130121211 in words is "twenty-one trillion, one hundred one billion, one hundred thirty million, one hundred twenty-one thousand, two hundred eleven".