21020010200201 has 4 divisors (see below), whose sum is σ = 21022590300432. Its totient is φ = 21017430099972.

The previous prime is 21020010200107. The next prime is 21020010200263. The reversal of 21020010200201 is 10200201002012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21020010200201 - 2²⁶ = 21019943091337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020010260201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290037895 + ... + 1290054188.

It is an arithmetic number, because the mean of its divisors is an integer number (5255647575108).

Almost surely, 2^{21020010200201} is an apocalyptic number.

It is an amenable number.

21020010200201 is a deficient number, since it is larger than the sum of its proper divisors (2580100231).

21020010200201 is an equidigital number, since it uses as much as digits as its factorization.

21020010200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580100230.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21020010200201 its reverse (10200201002012), we get a palindrome (31220211202213).

The spelling of 21020010200201 in words is "twenty-one trillion, twenty billion, ten million, two hundred thousand, two hundred one".