21102112211013 has 8 divisors (see below), whose sum is σ = 31262388460800. Its totient is φ = 14068074807324.

The previous prime is 21102112210987. The next prime is 21102112211023. The reversal of 21102112211013 is 31011221120112.

It is a happy number.

21102112211013 is a `hidden beast` number, since 211 + 0 + 211 + 221 + 10 + 13 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21102112211013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102112211023) 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, 390779855733 + ... + 390779855786.

It is an arithmetic number, because the mean of its divisors is an integer number (3907798557600).

Almost surely, 2^{21102112211013} is an apocalyptic number.

It is an amenable number.

21102112211013 is a deficient number, since it is larger than the sum of its proper divisors (10160276249787).

21102112211013 is an equidigital number, since it uses as much as digits as its factorization.

21102112211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781559711528 (or 781559711522 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21102112211013 its reverse (31011221120112), we get a palindrome (52113333331125).

The spelling of 21102112211013 in words is "twenty-one trillion, one hundred two billion, one hundred twelve million, two hundred eleven thousand, thirteen".