145505101021 has 8 divisors (see below), whose sum is σ = 166325063040. Its totient is φ = 124693518768.

The previous prime is 145505101019. The next prime is 145505101087. The reversal of 145505101021 is 120101505541.

145505101021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145505101021 - 2¹ = 145505101019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145505401021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057686 + ... + 2127223.

It is an arithmetic number, because the mean of its divisors is an integer number (20790632880).

Almost surely, 2^145505101021 is an apocalyptic number.

It is an amenable number.

145505101021 is a deficient number, since it is larger than the sum of its proper divisors (20819962019).

145505101021 is an equidigital number, since it uses as much as digits as its factorization.

145505101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189883.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 145505101021 its reverse (120101505541), we get a palindrome (265606606562).

The spelling of 145505101021 in words is "one hundred forty-five billion, five hundred five million, one hundred one thousand, twenty-one".