21020132112985 has 8 divisors (see below), whose sum is σ = 25272388287360. Its totient is φ = 16783952522544.

The previous prime is 21020132112943. The next prime is 21020132113051. The reversal of 21020132112985 is 58921123102012.

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 21020132112985 - 2⁷ = 21020132112857 is a prime.

It is a super-2 number, since 2×21020132112985² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4019143105 + ... + 4019148334.

It is an arithmetic number, because the mean of its divisors is an integer number (3159048535920).

Almost surely, 2^{21020132112985} is an apocalyptic number.

It is an amenable number.

21020132112985 is a deficient number, since it is larger than the sum of its proper divisors (4252256174375).

21020132112985 is an equidigital number, since it uses as much as digits as its factorization.

21020132112985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8038291967.

The product of its (nonzero) digits is 17280, while the sum is 37.

Adding to 21020132112985 its reverse (58921123102012), we get a palindrome (79941255214997).

The spelling of 21020132112985 in words is "twenty-one trillion, twenty billion, one hundred thirty-two million, one hundred twelve thousand, nine hundred eighty-five".