21102112222211 has 8 divisors (see below), whose sum is σ = 21215072283024. Its totient is φ = 20989189509120.

The previous prime is 21102112222199. The next prime is 21102112222223. The reversal of 21102112222211 is 11222221120112.

It is an interprime number because it is at equal distance from previous prime (21102112222199) and next prime (21102112222223).

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 21102112222211 - 2¹⁴ = 21102112205827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102112222511) 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, 8203505 + ... + 10464306.

It is an arithmetic number, because the mean of its divisors is an integer number (2651884035378).

Almost surely, 2^{21102112222211} is an apocalyptic number.

21102112222211 is a deficient number, since it is larger than the sum of its proper divisors (112960060813).

21102112222211 is a wasteful number, since it uses less digits than its factorization.

21102112222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18673861.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21102112222211 its reverse (11222221120112), we get a palindrome (32324333342323).

The spelling of 21102112222211 in words is "twenty-one trillion, one hundred two billion, one hundred twelve million, two hundred twenty-two thousand, two hundred eleven".