21222131333201 has 4 divisors (see below), whose sum is σ = 21222382558272. Its totient is φ = 21221880108132.

The previous prime is 21222131333189. The next prime is 21222131333231. The reversal of 21222131333201 is 10233313122212.

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 21222131333201 - 2²² = 21222127138897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222131333231) 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, 125485781 + ... + 125654786.

It is an arithmetic number, because the mean of its divisors is an integer number (5305595639568).

Almost surely, 2^{21222131333201} is an apocalyptic number.

It is an amenable number.

21222131333201 is a deficient number, since it is larger than the sum of its proper divisors (251225071).

21222131333201 is an equidigital number, since it uses as much as digits as its factorization.

21222131333201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251225070.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21222131333201 its reverse (10233313122212), we get a palindrome (31455444455413).

The spelling of 21222131333201 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred thirty-one million, three hundred thirty-three thousand, two hundred one".