21103202021013 has 12 divisors (see below), whose sum is σ = 34837031907808. Its totient is φ = 12058972583400.

The previous prime is 21103202020939. The next prime is 21103202021017. The reversal of 21103202021013 is 31012020230112.

21103202021013 is a `hidden beast` number, since 2 + 110 + 320 + 20 + 210 + 1 + 3 = 666.

It is not a de Polignac number, because 21103202021013 - 2⁸ = 21103202020757 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 (21103202021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167485730263 + ... + 167485730388.

Almost surely, 2^{21103202021013} is an apocalyptic number.

It is an amenable number.

21103202021013 is a deficient number, since it is larger than the sum of its proper divisors (13733829886795).

21103202021013 is a wasteful number, since it uses less digits than its factorization.

21103202021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334971460664 (or 334971460661 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21103202021013 its reverse (31012020230112), we get a palindrome (52115222251125).

The spelling of 21103202021013 in words is "twenty-one trillion, one hundred three billion, two hundred two million, twenty-one thousand, thirteen".