1243121433001 has 16 divisors (see below), whose sum is σ = 1444209655680. Its totient is φ = 1048050783360.

The previous prime is 1243121432983. The next prime is 1243121433041. The reversal of 1243121433001 is 1003341213421.

It is a de Polignac number, because none of the positive numbers 2^k-1243121433001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243121433041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5841655 + ... + 6050716.

It is an arithmetic number, because the mean of its divisors is an integer number (90263103480).

Almost surely, 2^{1243121433001} is an apocalyptic number.

It is an amenable number.

1243121433001 is a deficient number, since it is larger than the sum of its proper divisors (201088222679).

1243121433001 is a wasteful number, since it uses less digits than its factorization.

1243121433001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892624.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1243121433001 its reverse (1003341213421), we get a palindrome (2246462646422).

The spelling of 1243121433001 in words is "one trillion, two hundred forty-three billion, one hundred twenty-one million, four hundred thirty-three thousand, one".