1222222020121 has 2 divisors, whose sum is σ = 1222222020122. Its totient is φ = 1222222020120.

The previous prime is 1222222020119. The next prime is 1222222020137. The reversal of 1222222020121 is 1210202222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 638776585225 + 583445434896 = 799235^2 + 763836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222222020121 - 2¹ = 1222222020119 is a prime.

Together with 1222222020119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1222222020821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611111010060 + 611111010061.

It is an arithmetic number, because the mean of its divisors is an integer number (611111010061).

Almost surely, 2^{1222222020121} is an apocalyptic number.

It is an amenable number.

1222222020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222222020121 is an equidigital number, since it uses as much as digits as its factorization.

1222222020121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1222222020121 its reverse (1210202222221), we get a palindrome (2432424242342).

The spelling of 1222222020121 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".