21102122211011 has 8 divisors (see below), whose sum is σ = 21114504104400. Its totient is φ = 21089742680160.

The previous prime is 21102122210969. The next prime is 21102122211043. The reversal of 21102122211011 is 11011222120112.

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 21102122211011 - 2³⁸ = 20827244304067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102122291011) 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, 17439725 + ... + 18610433.

It is an arithmetic number, because the mean of its divisors is an integer number (2639313013050).

Almost surely, 2^{21102122211011} is an apocalyptic number.

21102122211011 is a deficient number, since it is larger than the sum of its proper divisors (12381893389).

21102122211011 is a wasteful number, since it uses less digits than its factorization.

21102122211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181269.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21102122211011 its reverse (11011222120112), we get a palindrome (32113344331123).

The spelling of 21102122211011 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred eleven thousand, eleven".