21000104431011 has 40 divisors (see below), whose sum is σ = 32618847828864. Its totient is φ = 13449560423040.

The previous prime is 21000104430983. The next prime is 21000104431049. The reversal of 21000104431011 is 11013440100012.

21000104431011 is a `hidden beast` number, since 210 + 0 + 0 + 1 + 0 + 443 + 1 + 0 + 11 = 666.

It is not a de Polignac number, because 21000104431011 - 2⁶ = 21000104430947 is a prime.

It is a super-2 number, since 2×21000104431011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000104431051) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30178780 + ... + 30866793.

Almost surely, 2^{21000104431011} is an apocalyptic number.

21000104431011 is a deficient number, since it is larger than the sum of its proper divisors (11618743397853).

21000104431011 is a wasteful number, since it uses less digits than its factorization.

21000104431011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61045753 (or 61045744 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21000104431011 its reverse (11013440100012), we get a palindrome (32013544531023).

The spelling of 21000104431011 in words is "twenty-one trillion, one hundred four million, four hundred thirty-one thousand, eleven".