2121515542043 has 2 divisors, whose sum is σ = 2121515542044. Its totient is φ = 2121515542042.

The previous prime is 2121515542039. The next prime is 2121515542067. The reversal of 2121515542043 is 3402455151212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121515542043 - 2² = 2121515542039 is a prime.

It is a super-2 number, since 2×2121515542043² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121515541994 and 2121515542012.

It is not a weakly prime, because it can be changed into another prime (2121515541043) 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, 1060757771021 + 1060757771022.

It is an arithmetic number, because the mean of its divisors is an integer number (1060757771022).

Almost surely, 2^{2121515542043} is an apocalyptic number.

2121515542043 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121515542043 is an equidigital number, since it uses as much as digits as its factorization.

2121515542043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 2121515542043 in words is "two trillion, one hundred twenty-one billion, five hundred fifteen million, five hundred forty-two thousand, forty-three".