145111003042121 has 4 divisors (see below), whose sum is σ = 145111218626244. Its totient is φ = 145110787458000.

The previous prime is 145111003042111. The next prime is 145111003042129. The reversal of 145111003042121 is 121240300111541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121804663345225 + 23306339696896 = 11036515^2 + 4827664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145111003042121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145111003042129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106779230 + ... + 108129671.

It is an arithmetic number, because the mean of its divisors is an integer number (36277804656561).

Almost surely, 2^{145111003042121} is an apocalyptic number.

It is an amenable number.

145111003042121 is a deficient number, since it is larger than the sum of its proper divisors (215584123).

145111003042121 is an equidigital number, since it uses as much as digits as its factorization.

145111003042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215584122.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 145111003042121 its reverse (121240300111541), we get a palindrome (266351303153662).

The spelling of 145111003042121 in words is "one hundred forty-five trillion, one hundred eleven billion, three million, forty-two thousand, one hundred twenty-one".