145420321201 has 4 divisors (see below), whose sum is σ = 145422774052. Its totient is φ = 145417868352.

The previous prime is 145420321171. The next prime is 145420321243. The reversal of 145420321201 is 102123024541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102123024541 = 179833 ⋅567877.

It can be written as a sum of positive squares in 2 ways, for example, as 123709772176 + 21710549025 = 351724^2 + 147345^2 .

It is a cyclic number.

It is not a de Polignac number, because 145420321201 - 2⁵ = 145420321169 is a prime.

It is a super-2 number, since 2×145420321201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145420325201) 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, 1135236 + ... + 1256821.

It is an arithmetic number, because the mean of its divisors is an integer number (36355693513).

Almost surely, 2^145420321201 is an apocalyptic number.

It is an amenable number.

145420321201 is a deficient number, since it is larger than the sum of its proper divisors (2452851).

145420321201 is an equidigital number, since it uses as much as digits as its factorization.

145420321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452850.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 145420321201 its reverse (102123024541), we get a palindrome (247543345742).

The spelling of 145420321201 in words is "one hundred forty-five billion, four hundred twenty million, three hundred twenty-one thousand, two hundred one".