221020022122357 has 2 divisors, whose sum is σ = 221020022122358. Its totient is φ = 221020022122356.

The previous prime is 221020022122337. The next prime is 221020022122373. The reversal of 221020022122357 is 753221220020122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135425680660516 + 85594341461841 = 11637254^2 + 9251721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020022122357 is a prime.

It is a super-3 number, since 3×221020022122357³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020022122337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510011061178 + 110510011061179.

It is an arithmetic number, because the mean of its divisors is an integer number (110510011061179).

Almost surely, 2^{221020022122357} is an apocalyptic number.

It is an amenable number.

221020022122357 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020022122357 is an equidigital number, since it uses as much as digits as its factorization.

221020022122357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 221020022122357 its reverse (753221220020122), we get a palindrome (974241242142479).

The spelling of 221020022122357 in words is "two hundred twenty-one trillion, twenty billion, twenty-two million, one hundred twenty-two thousand, three hundred fifty-seven".