145252313121 has 32 divisors (see below), whose sum is σ = 208620361728. Its totient is φ = 89560074240.

The previous prime is 145252313113. The next prime is 145252313123. The reversal of 145252313121 is 121313252541.

It is a happy number.

It is not a de Polignac number, because 145252313121 - 2³ = 145252313113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145252313123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3360181 + ... + 3403133.

It is an arithmetic number, because the mean of its divisors is an integer number (6519386304).

Almost surely, 2^145252313121 is an apocalyptic number.

It is an amenable number.

145252313121 is a deficient number, since it is larger than the sum of its proper divisors (63368048607).

145252313121 is a wasteful number, since it uses less digits than its factorization.

145252313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44121.

The product of its digits is 7200, while the sum is 30.

Adding to 145252313121 its reverse (121313252541), we get a palindrome (266565565662).

The spelling of 145252313121 in words is "one hundred forty-five billion, two hundred fifty-two million, three hundred thirteen thousand, one hundred twenty-one".