21010200212021 has 8 divisors (see below), whose sum is σ = 22119734260320. Its totient is φ = 19901039567472.

The previous prime is 21010200212017. The next prime is 21010200212033. The reversal of 21010200212021 is 12021200201012.

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 21010200212021 - 2² = 21010200212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010200211987 and 21010200212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010200212011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93235430 + ... + 93460503.

It is an arithmetic number, because the mean of its divisors is an integer number (2764966782540).

Almost surely, 2^{21010200212021} is an apocalyptic number.

It is an amenable number.

21010200212021 is a deficient number, since it is larger than the sum of its proper divisors (1109534048299).

21010200212021 is a wasteful number, since it uses less digits than its factorization.

21010200212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186701875.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010200212021 its reverse (12021200201012), we get a palindrome (33031400413033).

The spelling of 21010200212021 in words is "twenty-one trillion, ten billion, two hundred million, two hundred twelve thousand, twenty-one".