221213101022357 has 2 divisors, whose sum is σ = 221213101022358. Its totient is φ = 221213101022356.

The previous prime is 221213101022281. The next prime is 221213101022363. The reversal of 221213101022357 is 753220101312122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220554161336356 + 658939686001 = 14851066^2 + 811751^2 .

It is a cyclic number.

It is not a de Polignac number, because 221213101022357 - 2⁸ = 221213101022101 is a prime.

It is a super-2 number, since 2×221213101022357² (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 (221213101822357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606550511178 + 110606550511179.

It is an arithmetic number, because the mean of its divisors is an integer number (110606550511179).

Almost surely, 2^{221213101022357} is an apocalyptic number.

It is an amenable number.

221213101022357 is a deficient number, since it is larger than the sum of its proper divisors (1).

221213101022357 is an equidigital number, since it uses as much as digits as its factorization.

221213101022357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 221213101022357 its reverse (753220101312122), we get a palindrome (974433202334479).

The spelling of 221213101022357 in words is "two hundred twenty-one trillion, two hundred thirteen billion, one hundred one million, twenty-two thousand, three hundred fifty-seven".