21111110013 has 16 divisors (see below), whose sum is σ = 32185324160. Its totient is φ = 12057486336.

The previous prime is 21111110011. The next prime is 21111110023. The reversal of 21111110013 is 31001111112.

It is not a de Polignac number, because 21111110013 - 2¹ = 21111110011 is a prime.

It is a super-3 number, since 3×21111110013³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111110011) 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, 206848 + ... + 291561.

It is an arithmetic number, because the mean of its divisors is an integer number (2011582760).

Almost surely, 2^21111110013 is an apocalyptic number.

It is an amenable number.

21111110013 is a deficient number, since it is larger than the sum of its proper divisors (11074214147).

21111110013 is a wasteful number, since it uses less digits than its factorization.

21111110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500436.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 21111110013 its reverse (31001111112), we get a palindrome (52112221125).

The spelling of 21111110013 in words is "twenty-one billion, one hundred eleven million, one hundred ten thousand, thirteen".