21010200222001 has 4 divisors (see below), whose sum is σ = 21042875495152. Its totient is φ = 20977524948852.

The previous prime is 21010200221963. The next prime is 21010200222007. The reversal of 21010200222001 is 10022200201012.

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 21010200222001 - 2⁷ = 21010200221873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010200222007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16337635611 + ... + 16337636896.

It is an arithmetic number, because the mean of its divisors is an integer number (5260718873788).

Almost surely, 2^{21010200222001} is an apocalyptic number.

It is an amenable number.

21010200222001 is a deficient number, since it is larger than the sum of its proper divisors (32675273151).

21010200222001 is an equidigital number, since it uses as much as digits as its factorization.

21010200222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32675273150.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010200222001 its reverse (10022200201012), we get a palindrome (31032400423013).

The spelling of 21010200222001 in words is "twenty-one trillion, ten billion, two hundred million, two hundred twenty-two thousand, one".