21111013130004 has 36 divisors (see below), whose sum is σ = 60987371265184. Its totient is φ = 6031718037072.

The previous prime is 21111013129951. The next prime is 21111013130027. The reversal of 21111013130004 is 40003131011112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41886930562 + ... + 41886931065.

Almost surely, 2^{21111013130004} is an apocalyptic number.

It is an amenable number.

21111013130004 is an abundant number, since it is smaller than the sum of its proper divisors (39876358135180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111013130004 is a wasteful number, since it uses less digits than its factorization.

21111013130004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83773861644 (or 83773861639 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111013130004 its reverse (40003131011112), we get a palindrome (61114144141116).

The spelling of 21111013130004 in words is "twenty-one trillion, one hundred eleven billion, thirteen million, one hundred thirty thousand, four".