21131300234004 has 12 divisors (see below), whose sum is σ = 49306367212704. Its totient is φ = 7043766744664.

The previous prime is 21131300233999. The next prime is 21131300234039. The reversal of 21131300234004 is 40043200313112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880470843072 + ... + 880470843095.

It is an arithmetic number, because the mean of its divisors is an integer number (4108863934392).

Almost surely, 2^{21131300234004} is an apocalyptic number.

It is an amenable number.

21131300234004 is an abundant number, since it is smaller than the sum of its proper divisors (28175066978700).

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

21131300234004 is a wasteful number, since it uses less digits than its factorization.

21131300234004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760941686174 (or 1760941686172 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21131300234004 its reverse (40043200313112), we get a palindrome (61174500547116).

The spelling of 21131300234004 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred million, two hundred thirty-four thousand, four".