221322313402357 has 2 divisors, whose sum is σ = 221322313402358. Its totient is φ = 221322313402356.

The previous prime is 221322313402301. The next prime is 221322313402397. The reversal of 221322313402357 is 753204313223122.

It is an a-pointer prime, because the next prime (221322313402397) can be obtained adding 221322313402357 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215266821056676 + 6055492345681 = 14671974^2 + 2460791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221322313402357 is a prime.

It is a super-2 number, since 2×221322313402357² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221322313402397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661156701178 + 110661156701179.

It is an arithmetic number, because the mean of its divisors is an integer number (110661156701179).

Almost surely, 2^{221322313402357} is an apocalyptic number.

It is an amenable number.

221322313402357 is a deficient number, since it is larger than the sum of its proper divisors (1).

221322313402357 is an equidigital number, since it uses as much as digits as its factorization.

221322313402357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 40.

Adding to 221322313402357 its reverse (753204313223122), we get a palindrome (974526626625479).

The spelling of 221322313402357 in words is "two hundred twenty-one trillion, three hundred twenty-two billion, three hundred thirteen million, four hundred two thousand, three hundred fifty-seven".