1022211222121 has 2 divisors, whose sum is σ = 1022211222122. Its totient is φ = 1022211222120.

The previous prime is 1022211222101. The next prime is 1022211222167. The reversal of 1022211222121 is 1212221122201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783711825625 + 238499396496 = 885275^2 + 488364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022211222121 - 2¹⁵ = 1022211189353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022211222101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511105611060 + 511105611061.

It is an arithmetic number, because the mean of its divisors is an integer number (511105611061).

Almost surely, 2^{1022211222121} is an apocalyptic number.

It is an amenable number.

1022211222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022211222121 is an equidigital number, since it uses as much as digits as its factorization.

1022211222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1022211222121 its reverse (1212221122201), we get a palindrome (2234432344322).

The spelling of 1022211222121 in words is "one trillion, twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".