21011021102000 has 40 divisors (see below), whose sum is σ = 50804649029472. Its totient is φ = 8404408440000.

The previous prime is 21011021101909. The next prime is 21011021102069. The reversal of 21011021102000 is 20112011012.

It is a tau number, because it is divible by the number of its divisors (40).

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, 5252753276 + ... + 5252757275.

Almost surely, 2^{21011021102000} is an apocalyptic number.

21011021102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011021102000 is an abundant number, since it is smaller than the sum of its proper divisors (29793627927472).

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

21011021102000 is a wasteful number, since it uses less digits than its factorization.

21011021102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505510574 (or 10505510558 counting only the distinct ones).

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

Adding to 21011021102000 its reverse (20112011012), we get a palindrome (21031133113012).

The spelling of 21011021102000 in words is "twenty-one trillion, eleven billion, twenty-one million, one hundred two thousand".