21115335561026 has 8 divisors (see below), whose sum is σ = 36197718104640. Its totient is φ = 9049429526148.

The previous prime is 21115335560989. The next prime is 21115335561029. The reversal of 21115335561026 is 62016553351112.

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

It is not an unprimeable number, because it can be changed into a prime (21115335561029) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 754119127166 + ... + 754119127193.

It is an arithmetic number, because the mean of its divisors is an integer number (4524714763080).

Almost surely, 2^{21115335561026} is an apocalyptic number.

21115335561026 is a deficient number, since it is larger than the sum of its proper divisors (15082382543614).

21115335561026 is a wasteful number, since it uses less digits than its factorization.

21115335561026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508238254368.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 21115335561026 in words is "twenty-one trillion, one hundred fifteen billion, three hundred thirty-five million, five hundred sixty-one thousand, twenty-six".