21030220201 has 16 divisors (see below), whose sum is σ = 21795782400. Its totient is φ = 20282790528.

The previous prime is 21030220199. The next prime is 21030220217. The reversal of 21030220201 is 10202203012.

It is a cyclic number.

It is not a de Polignac number, because 21030220201 - 2¹ = 21030220199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030220501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565555 + ... + 601591.

It is an arithmetic number, because the mean of its divisors is an integer number (1362236400).

Almost surely, 2^21030220201 is an apocalyptic number.

It is an amenable number.

21030220201 is a deficient number, since it is larger than the sum of its proper divisors (765562199).

21030220201 is an equidigital number, since it uses as much as digits as its factorization.

21030220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36288.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21030220201 its reverse (10202203012), we get a palindrome (31232423213).

The spelling of 21030220201 in words is "twenty-one billion, thirty million, two hundred twenty thousand, two hundred one".