21102002201211 has 4 divisors (see below), whose sum is σ = 28136002934952. Its totient is φ = 14068001467472.

The previous prime is 21102002201173. The next prime is 21102002201213. The reversal of 21102002201211 is 11210220020112.

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 21102002201211 - 2²⁶ = 21101935092347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102002201213) 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, 3517000366866 + ... + 3517000366871.

It is an arithmetic number, because the mean of its divisors is an integer number (7034000733738).

Almost surely, 2^{21102002201211} is an apocalyptic number.

21102002201211 is a deficient number, since it is larger than the sum of its proper divisors (7034000733741).

21102002201211 is an equidigital number, since it uses as much as digits as its factorization.

21102002201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034000733740.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21102002201211 its reverse (11210220020112), we get a palindrome (32312222221323).

The spelling of 21102002201211 in words is "twenty-one trillion, one hundred two billion, two million, two hundred one thousand, two hundred eleven".