21102002212011 has 16 divisors (see below), whose sum is σ = 33847823097600. Its totient is φ = 11423640295008.

The previous prime is 21102002212007. The next prime is 21102002212013. The reversal of 21102002212011 is 11021220020112.

It is not a de Polignac number, because 21102002212011 - 2² = 21102002212007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102002212013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26443611396 + ... + 26443612193.

It is an arithmetic number, because the mean of its divisors is an integer number (2115488943600).

Almost surely, 2^{21102002212011} is an apocalyptic number.

21102002212011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21102002212011 is a deficient number, since it is larger than the sum of its proper divisors (12745820885589).

21102002212011 is a wasteful number, since it uses less digits than its factorization.

21102002212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52887223618.

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

Adding to 21102002212011 its reverse (11021220020112), we get a palindrome (32123222232123).

The spelling of 21102002212011 in words is "twenty-one trillion, one hundred two billion, two million, two hundred twelve thousand, eleven".