21102122211211 has 8 divisors (see below), whose sum is σ = 21484177371360. Its totient is φ = 20723493555072.

The previous prime is 21102122211113. The next prime is 21102122211217. The reversal of 21102122211211 is 11211222120112.

It is a happy number.

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 21102122211211 - 2⁹ = 21102122210699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102122211217) 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, 856613575 + ... + 856638208.

It is an arithmetic number, because the mean of its divisors is an integer number (2685522171420).

Almost surely, 2^{21102122211211} is an apocalyptic number.

21102122211211 is a deficient number, since it is larger than the sum of its proper divisors (382055160149).

21102122211211 is a wasteful number, since it uses less digits than its factorization.

21102122211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713252005.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21102122211211 its reverse (11211222120112), we get a palindrome (32313344331323).

The spelling of 21102122211211 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred eleven thousand, two hundred eleven".