2120155665041 has 2 divisors, whose sum is σ = 2120155665042. Its totient is φ = 2120155665040.

The previous prime is 2120155665013. The next prime is 2120155665241. The reversal of 2120155665041 is 1405665510212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1625806055041 + 494349610000 = 1275071^2 + 703100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120155665041 - 2²⁶ = 2120088556177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120155664986 and 2120155665004.

It is not a weakly prime, because it can be changed into another prime (2120155665011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060077832520 + 1060077832521.

It is an arithmetic number, because the mean of its divisors is an integer number (1060077832521).

Almost surely, 2^{2120155665041} is an apocalyptic number.

It is an amenable number.

2120155665041 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120155665041 is an equidigital number, since it uses as much as digits as its factorization.

2120155665041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 2120155665041 in words is "two trillion, one hundred twenty billion, one hundred fifty-five million, six hundred sixty-five thousand, forty-one".