21222331221101 has 4 divisors (see below), whose sum is σ = 21739949055804. Its totient is φ = 20704713386400.

The previous prime is 21222331221037. The next prime is 21222331221151. The reversal of 21222331221101 is 10112213322212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7657805391076 + 13564525830025 = 2767274^2 + 3683005^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222331221101 - 2⁶ = 21222331221037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222331221151) 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, 258808917290 + ... + 258808917371.

It is an arithmetic number, because the mean of its divisors is an integer number (5434987263951).

Almost surely, 2^{21222331221101} is an apocalyptic number.

It is an amenable number.

21222331221101 is a deficient number, since it is larger than the sum of its proper divisors (517617834703).

21222331221101 is an equidigital number, since it uses as much as digits as its factorization.

21222331221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517617834702.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21222331221101 its reverse (10112213322212), we get a palindrome (31334544543313).

The spelling of 21222331221101 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred thirty-one million, two hundred twenty-one thousand, one hundred one".