21020111012000 has 96 divisors (see below), whose sum is σ = 52521776274240. Its totient is φ = 8265535084800.

The previous prime is 21020111011919. The next prime is 21020111012077. The reversal of 21020111012000 is 21011102012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44298134 + ... + 44770133.

It is an arithmetic number, because the mean of its divisors is an integer number (547101836190).

Almost surely, 2^{21020111012000} is an apocalyptic number.

21020111012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020111012000 is an abundant number, since it is smaller than the sum of its proper divisors (31501665262240).

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

21020111012000 is an equidigital number, since it uses as much as digits as its factorization.

21020111012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89068351 (or 89068333 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21020111012000 its reverse (21011102012), we get a palindrome (21041122114012).

The spelling of 21020111012000 in words is "twenty-one trillion, twenty billion, one hundred eleven million, twelve thousand".