21500443115133 has 64 divisors (see below), whose sum is σ = 33320819404800. Its totient is φ = 12247798492160.

The previous prime is 21500443115117. The next prime is 21500443115189. The reversal of 21500443115133 is 33151134400512.

It is not a de Polignac number, because 21500443115133 - 2⁴ = 21500443115117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21500443115094 and 21500443115103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21500443115633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3349353 + ... + 7363358.

It is an arithmetic number, because the mean of its divisors is an integer number (520637803200).

Almost surely, 2^{21500443115133} is an apocalyptic number.

21500443115133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21500443115133 is a deficient number, since it is larger than the sum of its proper divisors (11820376289667).

21500443115133 is a wasteful number, since it uses less digits than its factorization.

21500443115133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712842.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 21500443115133 its reverse (33151134400512), we get a palindrome (54651577515645).

The spelling of 21500443115133 in words is "twenty-one trillion, five hundred billion, four hundred forty-three million, one hundred fifteen thousand, one hundred thirty-three".