21220201003201 has 4 divisors (see below), whose sum is σ = 22337053687600. Its totient is φ = 20103348318804.

The previous prime is 21220201003187. The next prime is 21220201003219. The reversal of 21220201003201 is 10230010202212.

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 21220201003201 - 2¹³ = 21220200995009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220201003301) 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, 558426342171 + ... + 558426342208.

It is an arithmetic number, because the mean of its divisors is an integer number (5584263421900).

Almost surely, 2^{21220201003201} is an apocalyptic number.

It is an amenable number.

21220201003201 is a deficient number, since it is larger than the sum of its proper divisors (1116852684399).

21220201003201 is a wasteful number, since it uses less digits than its factorization.

21220201003201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116852684398.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21220201003201 its reverse (10230010202212), we get a palindrome (31450211205413).

The spelling of 21220201003201 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, three thousand, two hundred one".