1351644504121 has 2 divisors, whose sum is σ = 1351644504122. Its totient is φ = 1351644504120.

The previous prime is 1351644504107. The next prime is 1351644504139. The reversal of 1351644504121 is 1214054461531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336823876521 + 14820627600 = 1156211^2 + 121740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351644504121 - 2¹⁷ = 1351644373049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1351644504101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675822252060 + 675822252061.

It is an arithmetic number, because the mean of its divisors is an integer number (675822252061).

Almost surely, 2^{1351644504121} is an apocalyptic number.

It is an amenable number.

1351644504121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351644504121 is an equidigital number, since it uses as much as digits as its factorization.

1351644504121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 1351644504121 its reverse (1214054461531), we get a palindrome (2565698965652).

The spelling of 1351644504121 in words is "one trillion, three hundred fifty-one billion, six hundred forty-four million, five hundred four thousand, one hundred twenty-one".