21212110000005 has 8 divisors (see below), whose sum is σ = 33939376000032. Its totient is φ = 11313125333328.

The previous prime is 21212109999991. The next prime is 21212110000021. The reversal of 21212110000005 is 50000001121212.

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

It is not a de Polignac number, because 21212110000005 - 2⁷ = 21212109999877 is a prime.

It is a super-3 number, since 3×21212110000005³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1414140666667 = 21212110000005 / (2 + 1 + 2 + 1 + 2 + 1 + 1 + 0 + 0 + 0 + 0 + 0 + 0 + 5).

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 7 ways as a sum of consecutive naturals, for example, 707070333319 + ... + 707070333348.

It is an arithmetic number, because the mean of its divisors is an integer number (4242422000004).

Almost surely, 2^{21212110000005} is an apocalyptic number.

It is an amenable number.

21212110000005 is a deficient number, since it is larger than the sum of its proper divisors (12727266000027).

21212110000005 is a wasteful number, since it uses less digits than its factorization.

21212110000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414140666675.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 21212110000005 its reverse (50000001121212), we get a palindrome (71212111121217).

The spelling of 21212110000005 in words is "twenty-one trillion, two hundred twelve billion, one hundred ten million, five", and thus it is an aban number.