1321450123501 has 2 divisors, whose sum is σ = 1321450123502. Its totient is φ = 1321450123500.

The previous prime is 1321450123387. The next prime is 1321450123507. The reversal of 1321450123501 is 1053210541231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899860932100 + 421589191401 = 948610^2 + 649299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321450123501 - 2³³ = 1312860188909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321450123501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321450123507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660725061750 + 660725061751.

It is an arithmetic number, because the mean of its divisors is an integer number (660725061751).

Almost surely, 2^{1321450123501} is an apocalyptic number.

It is an amenable number.

1321450123501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321450123501 is an equidigital number, since it uses as much as digits as its factorization.

1321450123501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1321450123501 its reverse (1053210541231), we get a palindrome (2374660664732).

The spelling of 1321450123501 in words is "one trillion, three hundred twenty-one billion, four hundred fifty million, one hundred twenty-three thousand, five hundred one".