1012123301221 has 2 divisors, whose sum is σ = 1012123301222. Its totient is φ = 1012123301220.

The previous prime is 1012123301207. The next prime is 1012123301237. The reversal of 1012123301221 is 1221033212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997102102500 + 15021198721 = 998550^2 + 122561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012123301221 - 2³³ = 1003533366629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012123301621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506061650610 + 506061650611.

It is an arithmetic number, because the mean of its divisors is an integer number (506061650611).

Almost surely, 2^{1012123301221} is an apocalyptic number.

It is an amenable number.

1012123301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012123301221 is an equidigital number, since it uses as much as digits as its factorization.

1012123301221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1012123301221 its reverse (1221033212101), we get a palindrome (2233156513322).

The spelling of 1012123301221 in words is "one trillion, twelve billion, one hundred twenty-three million, three hundred one thousand, two hundred twenty-one".