1012111220321 has 2 divisors, whose sum is σ = 1012111220322. Its totient is φ = 1012111220320.

The previous prime is 1012111220297. The next prime is 1012111220327. The reversal of 1012111220321 is 1230221112101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716054440000 + 296056780321 = 846200^2 + 544111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012111220321 - 2¹⁰ = 1012111219297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012111220321.

It is not a weakly prime, because it can be changed into another prime (1012111220327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506055610160 + 506055610161.

It is an arithmetic number, because the mean of its divisors is an integer number (506055610161).

Almost surely, 2^{1012111220321} is an apocalyptic number.

It is an amenable number.

1012111220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012111220321 is an equidigital number, since it uses as much as digits as its factorization.

1012111220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1012111220321 its reverse (1230221112101), we get a palindrome (2242332332422).

The spelling of 1012111220321 in words is "one trillion, twelve billion, one hundred eleven million, two hundred twenty thousand, three hundred twenty-one".