22313222221 has 2 divisors, whose sum is σ = 22313222222. Its totient is φ = 22313222220.

The previous prime is 22313222219. The next prime is 22313222263. The reversal of 22313222221 is 12222231322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20338752996 + 1974469225 = 142614^2 + 44435^2 .

It is a cyclic number.

It is not a de Polignac number, because 22313222221 - 2¹ = 22313222219 is a prime.

It is a super-3 number, since 3×22313222221³ (a number of 32 digits) contains 333 as substring.

Together with 22313222219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22313222192 and 22313222201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22313222821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11156611110 + 11156611111.

It is an arithmetic number, because the mean of its divisors is an integer number (11156611111).

Almost surely, 2^22313222221 is an apocalyptic number.

It is an amenable number.

22313222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22313222221 is an equidigital number, since it uses as much as digits as its factorization.

22313222221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

Adding to 22313222221 its reverse (12222231322), we get a palindrome (34535453543).

The spelling of 22313222221 in words is "twenty-two billion, three hundred thirteen million, two hundred twenty-two thousand, two hundred twenty-one".