221240011357 has 2 divisors, whose sum is σ = 221240011358. Its totient is φ = 221240011356.

The previous prime is 221240011297. The next prime is 221240011373. The reversal of 221240011357 is 753110042122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156409176196 + 64830835161 = 395486^2 + 254619^2 .

It is a cyclic number.

It is not a de Polignac number, because 221240011357 - 2³⁵ = 186880272989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221240011757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110620005678 + 110620005679.

It is an arithmetic number, because the mean of its divisors is an integer number (110620005679).

Almost surely, 2^221240011357 is an apocalyptic number.

It is an amenable number.

221240011357 is a deficient number, since it is larger than the sum of its proper divisors (1).

221240011357 is an equidigital number, since it uses as much as digits as its factorization.

221240011357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 221240011357 its reverse (753110042122), we get a palindrome (974350053479).

The spelling of 221240011357 in words is "two hundred twenty-one billion, two hundred forty million, eleven thousand, three hundred fifty-seven".