21012020220201 has 8 divisors (see below), whose sum is σ = 28018028304000. Its totient is φ = 14007012808272.

The previous prime is 21012020220101. The next prime is 21012020220203. The reversal of 21012020220201 is 10202202021012.

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

It is not a de Polignac number, because 21012020220201 - 2³⁷ = 20874581266729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012020220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250118970 + ... + 250202963.

It is an arithmetic number, because the mean of its divisors is an integer number (3502253538000).

Almost surely, 2^{21012020220201} is an apocalyptic number.

It is an amenable number.

21012020220201 is a deficient number, since it is larger than the sum of its proper divisors (7006008083799).

21012020220201 is a wasteful number, since it uses less digits than its factorization.

21012020220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500335935.

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

Adding to 21012020220201 its reverse (10202202021012), we get a palindrome (31214222241213).

The spelling of 21012020220201 in words is "twenty-one trillion, twelve billion, twenty million, two hundred twenty thousand, two hundred one".