21101102103211 has 4 divisors (see below), whose sum is σ = 22724263803472. Its totient is φ = 19477940402952.

The previous prime is 21101102103139. The next prime is 21101102103227. The reversal of 21101102103211 is 11230120110112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21101102103211 - 2⁹ = 21101102102699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101102103241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811580850111 + ... + 811580850136.

It is an arithmetic number, because the mean of its divisors is an integer number (5681065950868).

Almost surely, 2^{21101102103211} is an apocalyptic number.

21101102103211 is a deficient number, since it is larger than the sum of its proper divisors (1623161700261).

21101102103211 is a wasteful number, since it uses less digits than its factorization.

21101102103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623161700260.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21101102103211 its reverse (11230120110112), we get a palindrome (32331222213323).

The spelling of 21101102103211 in words is "twenty-one trillion, one hundred one billion, one hundred two million, one hundred three thousand, two hundred eleven".