21354342103166 has 8 divisors (see below), whose sum is σ = 32032243715544. Its totient is φ = 10676927531320.

The previous prime is 21354342103151. The next prime is 21354342103169. The reversal of 21354342103166 is 66130124345312.

It is a happy number.

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 (21354342103169) 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 3 ways as a sum of consecutive naturals, for example, 121650500 + ... + 121825911.

It is an arithmetic number, because the mean of its divisors is an integer number (4004030464443).

Almost surely, 2^{21354342103166} is an apocalyptic number.

21354342103166 is a deficient number, since it is larger than the sum of its proper divisors (10677901612378).

21354342103166 is a wasteful number, since it uses less digits than its factorization.

21354342103166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243520266.

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 21354342103166 its reverse (66130124345312), we get a palindrome (87484466448478).

The spelling of 21354342103166 in words is "twenty-one trillion, three hundred fifty-four billion, three hundred forty-two million, one hundred three thousand, one hundred sixty-six".