1212122022257 has 2 divisors, whose sum is σ = 1212122022258. Its totient is φ = 1212122022256.

The previous prime is 1212122022187. The next prime is 1212122022263. The reversal of 1212122022257 is 7522202212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206359542336 + 5762479921 = 1098344^2 + 75911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212122022257 - 2¹⁴ = 1212122005873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212121022257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061011128 + 606061011129.

It is an arithmetic number, because the mean of its divisors is an integer number (606061011129).

Almost surely, 2^{1212122022257} is an apocalyptic number.

It is an amenable number.

1212122022257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122022257 is an equidigital number, since it uses as much as digits as its factorization.

1212122022257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 1212122022257 its reverse (7522202212121), we get a palindrome (8734324234378).

The spelling of 1212122022257 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, twenty-two thousand, two hundred fifty-seven".