20040121033811 has 2 divisors, whose sum is σ = 20040121033812. Its totient is φ = 20040121033810.

The previous prime is 20040121033747. The next prime is 20040121033813. The reversal of 20040121033811 is 11833012104002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20040121033811 - 2⁶ = 20040121033747 is a prime.

Together with 20040121033813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20040121033813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020060516905 + 10020060516906.

It is an arithmetic number, because the mean of its divisors is an integer number (10020060516906).

Almost surely, 2^{20040121033811} is an apocalyptic number.

20040121033811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040121033811 is an equidigital number, since it uses as much as digits as its factorization.

20040121033811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 20040121033811 its reverse (11833012104002), we get a palindrome (31873133137813).

The spelling of 20040121033811 in words is "twenty trillion, forty billion, one hundred twenty-one million, thirty-three thousand, eight hundred eleven".