21102023211013 has 4 divisors (see below), whose sum is σ = 21672348162700. Its totient is φ = 20531698259328.

The previous prime is 21102023210999. The next prime is 21102023211037. The reversal of 21102023211013 is 31011232020112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9053467174404 + 12048556036609 = 3008898^2 + 3471103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102023211013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102021211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285162475788 + ... + 285162475861.

It is an arithmetic number, because the mean of its divisors is an integer number (5418087040675).

Almost surely, 2^{21102023211013} is an apocalyptic number.

It is an amenable number.

21102023211013 is a deficient number, since it is larger than the sum of its proper divisors (570324951687).

21102023211013 is an equidigital number, since it uses as much as digits as its factorization.

21102023211013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570324951686.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21102023211013 its reverse (31011232020112), we get a palindrome (52113255231125).

The spelling of 21102023211013 in words is "twenty-one trillion, one hundred two billion, twenty-three million, two hundred eleven thousand, thirteen".