2212221101257 has 2 divisors, whose sum is σ = 2212221101258. Its totient is φ = 2212221101256.

The previous prime is 2212221101191. The next prime is 2212221101263. The reversal of 2212221101257 is 7521011222122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2209774413961 + 2446687296 = 1486531^2 + 49464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212221101257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2212221101557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106110550628 + 1106110550629.

It is an arithmetic number, because the mean of its divisors is an integer number (1106110550629).

Almost surely, 2^{2212221101257} is an apocalyptic number.

It is an amenable number.

2212221101257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212221101257 is an equidigital number, since it uses as much as digits as its factorization.

2212221101257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 2212221101257 its reverse (7521011222122), we get a palindrome (9733232323379).

The spelling of 2212221101257 in words is "two trillion, two hundred twelve billion, two hundred twenty-one million, one hundred one thousand, two hundred fifty-seven".