42121899082493 has 2 divisors, whose sum is σ = 42121899082494. Its totient is φ = 42121899082492.

The previous prime is 42121899082441. The next prime is 42121899082507. The reversal of 42121899082493 is 39428099812124.

42121899082493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35342525621764 + 6779373460729 = 5944958^2 + 2603723^2 .

It is a cyclic number.

It is not a de Polignac number, because 42121899082493 - 2²² = 42121894888189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121899012493) 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, 21060949541246 + 21060949541247.

It is an arithmetic number, because the mean of its divisors is an integer number (21060949541247).

Almost surely, 2^{42121899082493} is an apocalyptic number.

It is an amenable number.

42121899082493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121899082493 is an equidigital number, since it uses as much as digits as its factorization.

42121899082493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 42121899082493 in words is "forty-two trillion, one hundred twenty-one billion, eight hundred ninety-nine million, eighty-two thousand, four hundred ninety-three".