20040121033747 has 2 divisors, whose sum is σ = 20040121033748. Its totient is φ = 20040121033746.

The previous prime is 20040121033729. The next prime is 20040121033811. The reversal of 20040121033747 is 74733012104002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20040121033747 - 2⁷ = 20040121033619 is a prime.

It is not a weakly prime, because it can be changed into another prime (20040121063747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020060516873 + 10020060516874.

It is an arithmetic number, because the mean of its divisors is an integer number (10020060516874).

Almost surely, 2^{20040121033747} is an apocalyptic number.

20040121033747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040121033747 is an equidigital number, since it uses as much as digits as its factorization.

20040121033747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

Adding to 20040121033747 its reverse (74733012104002), we get a palindrome (94773133137749).

The spelling of 20040121033747 in words is "twenty trillion, forty billion, one hundred twenty-one million, thirty-three thousand, seven hundred forty-seven".