2120121221041 has 2 divisors, whose sum is σ = 2120121221042. Its totient is φ = 2120121221040.

The previous prime is 2120121220913. The next prime is 2120121221083. The reversal of 2120121221041 is 1401221210212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1757933908641 + 362187312400 = 1325871^2 + 601820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120121221041 - 2⁷ = 2120121220913 is a prime.

It is a super-2 number, since 2×2120121221041² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2120121224041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060060610520 + 1060060610521.

It is an arithmetic number, because the mean of its divisors is an integer number (1060060610521).

Almost surely, 2^{2120121221041} is an apocalyptic number.

It is an amenable number.

2120121221041 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120121221041 is an equidigital number, since it uses as much as digits as its factorization.

2120121221041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2120121221041 its reverse (1401221210212), we get a palindrome (3521342431253).

The spelling of 2120121221041 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, forty-one".