21115322361016 has 48 divisors (see below), whose sum is σ = 43250365726560. Its totient is φ = 9659289669120.

The previous prime is 21115322360989. The next prime is 21115322361019. The reversal of 21115322361016 is 61016322351112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115322361019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68952720 + ... + 69258271.

It is an arithmetic number, because the mean of its divisors is an integer number (901049285970).

Almost surely, 2^{21115322361016} is an apocalyptic number.

21115322361016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21115322361016 is an abundant number, since it is smaller than the sum of its proper divisors (22135043365544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115322361016 is a wasteful number, since it uses less digits than its factorization.

21115322361016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138211136 (or 138211119 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 21115322361016 in words is "twenty-one trillion, one hundred fifteen billion, three hundred twenty-two million, three hundred sixty-one thousand, sixteen".