21200202012021 has 8 divisors (see below), whose sum is σ = 28584542039040. Its totient is φ = 13974664996512.

The previous prime is 21200202011999. The next prime is 21200202012061. The reversal of 21200202012021 is 12021020200212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21200202012021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200202012061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39700752565 + ... + 39700753098.

It is an arithmetic number, because the mean of its divisors is an integer number (3573067754880).

Almost surely, 2^{21200202012021} is an apocalyptic number.

It is an amenable number.

21200202012021 is a deficient number, since it is larger than the sum of its proper divisors (7384340027019).

21200202012021 is an equidigital number, since it uses as much as digits as its factorization.

21200202012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79401505755.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21200202012021 its reverse (12021020200212), we get a palindrome (33221222212233).

The spelling of 21200202012021 in words is "twenty-one trillion, two hundred billion, two hundred two million, twelve thousand, twenty-one".