145421126560121 has 12 divisors (see below), whose sum is σ = 154886959452708. Its totient is φ = 136473969444384.

The previous prime is 145421126560081. The next prime is 145421126560133. The reversal of 145421126560121 is 121065621124541.

145421126560121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51585792405625 + 93835334154496 = 7182325^2 + 9686864^2 .

It is not a de Polignac number, because 145421126560121 - 2⁶ = 145421126560057 is a prime.

It is a super-2 number, since 2×145421126560121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145421126568121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2593350830 + ... + 2593406903.

It is an arithmetic number, because the mean of its divisors is an integer number (12907246621059).

Almost surely, 2^{145421126560121} is an apocalyptic number.

It is an amenable number.

145421126560121 is a deficient number, since it is larger than the sum of its proper divisors (9465832892587).

145421126560121 is an equidigital number, since it uses as much as digits as its factorization.

145421126560121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186757832 (or 5186757809 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

Adding to 145421126560121 its reverse (121065621124541), we get a palindrome (266486747684662).

The spelling of 145421126560121 in words is "one hundred forty-five trillion, four hundred twenty-one billion, one hundred twenty-six million, five hundred sixty thousand, one hundred twenty-one".