21213063005 has 16 divisors (see below), whose sum is σ = 26285952000. Its totient is φ = 16417313280.

The previous prime is 21213062947. The next prime is 21213063023. The reversal of 21213063005 is 50036031212.

It is not a de Polignac number, because 21213063005 - 2⁸ = 21213062749 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 455021 + ... + 499469.

It is an arithmetic number, because the mean of its divisors is an integer number (1642872000).

Almost surely, 2^21213063005 is an apocalyptic number.

It is an amenable number.

21213063005 is a deficient number, since it is larger than the sum of its proper divisors (5072888995).

21213063005 is a wasteful number, since it uses less digits than its factorization.

21213063005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47564.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21213063005 its reverse (50036031212), we get a palindrome (71249094217).

The spelling of 21213063005 in words is "twenty-one billion, two hundred thirteen million, sixty-three thousand, five".