1351120052021 has 2 divisors, whose sum is σ = 1351120052022. Its totient is φ = 1351120052020.

The previous prime is 1351120051961. The next prime is 1351120052069. The reversal of 1351120052021 is 1202500211531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828045400900 + 523074651121 = 909970^2 + 723239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351120052021 - 2¹⁰ = 1351120050997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351120054021) 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, 675560026010 + 675560026011.

It is an arithmetic number, because the mean of its divisors is an integer number (675560026011).

Almost surely, 2^{1351120052021} is an apocalyptic number.

It is an amenable number.

1351120052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351120052021 is an equidigital number, since it uses as much as digits as its factorization.

1351120052021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 1351120052021 its reverse (1202500211531), we get a palindrome (2553620263552).

The spelling of 1351120052021 in words is "one trillion, three hundred fifty-one billion, one hundred twenty million, fifty-two thousand, twenty-one".