2121121320041 has 2 divisors, whose sum is σ = 2121121320042. Its totient is φ = 2121121320040.

The previous prime is 2121121320023. The next prime is 2121121320079. The reversal of 2121121320041 is 1400231211212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1503161821225 + 617959498816 = 1226035^2 + 786104^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121121320041 - 2¹⁰ = 2121121319017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121121319995 and 2121121320022.

It is not a weakly prime, because it can be changed into another prime (2121121310041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560660020 + 1060560660021.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560660021).

Almost surely, 2^{2121121320041} is an apocalyptic number.

It is an amenable number.

2121121320041 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121121320041 is an equidigital number, since it uses as much as digits as its factorization.

2121121320041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2121121320041 its reverse (1400231211212), we get a palindrome (3521352531253).

The spelling of 2121121320041 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, three hundred twenty thousand, forty-one".