145013340021 has 128 divisors (see below), whose sum is σ = 227907993600. Its totient is φ = 81158837760.

The previous prime is 145013340001. The next prime is 145013340037. The reversal of 145013340021 is 120043310541.

It is a happy number.

It is not a de Polignac number, because 145013340021 - 2⁹ = 145013339509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145013339973 and 145013340000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145013340001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1043261370 + ... + 1043261508.

It is an arithmetic number, because the mean of its divisors is an integer number (1780531200).

Almost surely, 2^145013340021 is an apocalyptic number.

145013340021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145013340021 is a deficient number, since it is larger than the sum of its proper divisors (82894653579).

145013340021 is a wasteful number, since it uses less digits than its factorization.

145013340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 145013340021 its reverse (120043310541), we get a palindrome (265056650562).

The spelling of 145013340021 in words is "one hundred forty-five billion, thirteen million, three hundred forty thousand, twenty-one".