1012120221401 has 2 divisors, whose sum is σ = 1012120221402. Its totient is φ = 1012120221400.

The previous prime is 1012120221379. The next prime is 1012120221433. The reversal of 1012120221401 is 1041220212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801025000000 + 211095221401 = 895000^2 + 459451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012120221401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012120221401.

It is not a weakly prime, because it can be changed into another prime (1012120221481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506060110700 + 506060110701.

It is an arithmetic number, because the mean of its divisors is an integer number (506060110701).

Almost surely, 2^{1012120221401} is an apocalyptic number.

It is an amenable number.

1012120221401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012120221401 is an equidigital number, since it uses as much as digits as its factorization.

1012120221401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1012120221401 its reverse (1041220212101), we get a palindrome (2053340433502).

The spelling of 1012120221401 in words is "one trillion, twelve billion, one hundred twenty million, two hundred twenty-one thousand, four hundred one".