21021302102021 has 8 divisors (see below), whose sum is σ = 23829816148320. Its totient is φ = 18383001028272.

The previous prime is 21021302101999. The next prime is 21021302102029. The reversal of 21021302102021 is 12020120312012.

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 21021302102021 - 2⁶ = 21021302101957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021302102029) 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, 42553242875 + ... + 42553243368.

It is an arithmetic number, because the mean of its divisors is an integer number (2978727018540).

Almost surely, 2^{21021302102021} is an apocalyptic number.

It is an amenable number.

21021302102021 is a deficient number, since it is larger than the sum of its proper divisors (2808514046299).

21021302102021 is a wasteful number, since it uses less digits than its factorization.

21021302102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85106486275.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21021302102021 its reverse (12020120312012), we get a palindrome (33041422414033).

The spelling of 21021302102021 in words is "twenty-one trillion, twenty-one billion, three hundred two million, one hundred two thousand, twenty-one".