2221213220357 has 2 divisors, whose sum is σ = 2221213220358. Its totient is φ = 2221213220356.

The previous prime is 2221213220263. The next prime is 2221213220381. The reversal of 2221213220357 is 7530223121222.

2221213220357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906592070436 + 314621149921 = 1380794^2 + 560911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221213220357 - 2¹⁸ = 2221212958213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221213240357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110606610178 + 1110606610179.

It is an arithmetic number, because the mean of its divisors is an integer number (1110606610179).

Almost surely, 2^{2221213220357} is an apocalyptic number.

It is an amenable number.

2221213220357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221213220357 is an equidigital number, since it uses as much as digits as its factorization.

2221213220357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 2221213220357 its reverse (7530223121222), we get a palindrome (9751436341579).

The spelling of 2221213220357 in words is "two trillion, two hundred twenty-one billion, two hundred thirteen million, two hundred twenty thousand, three hundred fifty-seven".