21131026006 has 8 divisors (see below), whose sum is σ = 32370933600. Its totient is φ = 10340714808.

The previous prime is 21131025983. The next prime is 21131026009. The reversal of 21131026006 is 60062013112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131026009) 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, 112398981 + ... + 112399168.

It is an arithmetic number, because the mean of its divisors is an integer number (4046366700).

Almost surely, 2^21131026006 is an apocalyptic number.

21131026006 is a deficient number, since it is larger than the sum of its proper divisors (11239907594).

21131026006 is a wasteful number, since it uses less digits than its factorization.

21131026006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224798198.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21131026006 its reverse (60062013112), we get a palindrome (81193039118).

The spelling of 21131026006 in words is "twenty-one billion, one hundred thirty-one million, twenty-six thousand, six".