21110230013 has 4 divisors (see below), whose sum is σ = 21120646560. Its totient is φ = 21099813468.

The previous prime is 21110230007. The next prime is 21110230027. The reversal of 21110230013 is 31003201112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21110230013 - 2¹⁸ = 21109967869 is a prime.

It is a super-2 number, since 2×21110230013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21110230013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110230513) 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, 5205233 + ... + 5209286.

It is an arithmetic number, because the mean of its divisors is an integer number (5280161640).

Almost surely, 2^21110230013 is an apocalyptic number.

It is an amenable number.

21110230013 is a deficient number, since it is larger than the sum of its proper divisors (10416547).

21110230013 is a wasteful number, since it uses less digits than its factorization.

21110230013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10416546.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21110230013 its reverse (31003201112), we get a palindrome (52113431125).

The spelling of 21110230013 in words is "twenty-one billion, one hundred ten million, two hundred thirty thousand, thirteen".