21102102211 has 8 divisors (see below), whose sum is σ = 21176920800. Its totient is φ = 21027373440.

The previous prime is 21102102199. The next prime is 21102102223. The reversal of 21102102211 is 11220120112.

It is an interprime number because it is at equal distance from previous prime (21102102199) and next prime (21102102223).

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 21102102211 - 2¹⁷ = 21101971139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102102191 and 21102102200.

It is not an unprimeable number, because it can be changed into a prime (21102109211) 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, 467005 + ... + 510193.

It is an arithmetic number, because the mean of its divisors is an integer number (2647115100).

Almost surely, 2^21102102211 is an apocalyptic number.

21102102211 is a deficient number, since it is larger than the sum of its proper divisors (74818589).

21102102211 is a wasteful number, since it uses less digits than its factorization.

21102102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44909.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102102211 its reverse (11220120112), we get a palindrome (32322222323).

The spelling of 21102102211 in words is "twenty-one billion, one hundred two million, one hundred two thousand, two hundred eleven".