21020230102021 has 8 divisors (see below), whose sum is σ = 21110896010880. Its totient is φ = 20929568042592.

The previous prime is 21020230101869. The next prime is 21020230102037. The reversal of 21020230102021 is 12020103202012.

It is a happy number.

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 21020230102021 - 2⁹ = 21020230101509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020230101986 and 21020230102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020230106021) 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, 10264206 + ... + 12140608.

It is an arithmetic number, because the mean of its divisors is an integer number (2638862001360).

Almost surely, 2^{21020230102021} is an apocalyptic number.

It is an amenable number.

21020230102021 is a deficient number, since it is larger than the sum of its proper divisors (90665908859).

21020230102021 is a wasteful number, since it uses less digits than its factorization.

21020230102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924715.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21020230102021 its reverse (12020103202012), we get a palindrome (33040333304033).

The spelling of 21020230102021 in words is "twenty-one trillion, twenty billion, two hundred thirty million, one hundred two thousand, twenty-one".