1321230244501 has 4 divisors (see below), whose sum is σ = 1321233160000. Its totient is φ = 1321227329004.

The previous prime is 1321230244489. The next prime is 1321230244547. The reversal of 1321230244501 is 1054420321231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321230244501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321230244501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321200244501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615951 + ... + 1738348.

It is an arithmetic number, because the mean of its divisors is an integer number (330308290000).

Almost surely, 2^{1321230244501} is an apocalyptic number.

It is an amenable number.

1321230244501 is a deficient number, since it is larger than the sum of its proper divisors (2915499).

1321230244501 is an equidigital number, since it uses as much as digits as its factorization.

1321230244501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915498.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1321230244501 its reverse (1054420321231), we get a palindrome (2375650565732).

The spelling of 1321230244501 in words is "one trillion, three hundred twenty-one billion, two hundred thirty million, two hundred forty-four thousand, five hundred one".