1000120222121 has 2 divisors, whose sum is σ = 1000120222122. Its totient is φ = 1000120222120.

The previous prime is 1000120222093. The next prime is 1000120222147. The reversal of 1000120222121 is 1212220210001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714344445721 + 285775776400 = 845189^2 + 534580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000120222121 - 2¹⁴ = 1000120205737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000120222096 and 1000120222105.

It is not a weakly prime, because it can be changed into another prime (1000120122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500060111060 + 500060111061.

It is an arithmetic number, because the mean of its divisors is an integer number (500060111061).

Almost surely, 2^{1000120222121} is an apocalyptic number.

It is an amenable number.

1000120222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000120222121 is an equidigital number, since it uses as much as digits as its factorization.

1000120222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1000120222121 its reverse (1212220210001), we get a palindrome (2212340432122).

The spelling of 1000120222121 in words is "one trillion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".