21367102106551 has 8 divisors (see below), whose sum is σ = 21998245625840. Its totient is φ = 20738782496448.

The previous prime is 21367102106509. The next prime is 21367102106569. The reversal of 21367102106551 is 15560120176312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21367102106551 - 2¹⁹ = 21367101582263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21367102106951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705961941 + ... + 705992206.

It is an arithmetic number, because the mean of its divisors is an integer number (2749780703230).

Almost surely, 2^{21367102106551} is an apocalyptic number.

21367102106551 is a deficient number, since it is larger than the sum of its proper divisors (631143519289).

21367102106551 is a wasteful number, since it uses less digits than its factorization.

21367102106551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411954593.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 21367102106551 in words is "twenty-one trillion, three hundred sixty-seven billion, one hundred two million, one hundred six thousand, five hundred fifty-one".