21200101102021 has 8 divisors (see below), whose sum is σ = 21257281973664. Its totient is φ = 21142922071440.

The previous prime is 21200101102003. The next prime is 21200101102027. The reversal of 21200101102021 is 12020110100212.

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 21200101102021 - 2²¹ = 21200099004869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200101101992 and 21200101102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200101102027) 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, 24410166 + ... + 25263736.

It is an arithmetic number, because the mean of its divisors is an integer number (2657160246708).

Almost surely, 2^{21200101102021} is an apocalyptic number.

It is an amenable number.

21200101102021 is a deficient number, since it is larger than the sum of its proper divisors (57180871643).

21200101102021 is an equidigital number, since it uses as much as digits as its factorization.

21200101102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920531.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200101102021 its reverse (12020110100212), we get a palindrome (33220211202233).

The spelling of 21200101102021 in words is "twenty-one trillion, two hundred billion, one hundred one million, one hundred two thousand, twenty-one".