145305210424221 has 12 divisors (see below), whose sum is σ = 210433307355648. Its totient is φ = 96617215632264.

The previous prime is 145305210424201. The next prime is 145305210424291. The reversal of 145305210424221 is 122424012503541.

145305210424221 is a `hidden beast` number, since 1 + 4 + 5 + 3 + 0 + 5 + 2 + 1 + 0 + 424 + 221 = 666.

It is not a de Polignac number, because 145305210424221 - 2²⁶ = 145305143315357 is a prime.

It is a super-2 number, since 2×145305210424221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145305210424201) 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, 21077050575 + ... + 21077057468.

It is an arithmetic number, because the mean of its divisors is an integer number (17536108946304).

Almost surely, 2^{145305210424221} is an apocalyptic number.

It is an amenable number.

145305210424221 is a deficient number, since it is larger than the sum of its proper divisors (65128096931427).

145305210424221 is a wasteful number, since it uses less digits than its factorization.

145305210424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42154108432 (or 42154108429 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 145305210424221 its reverse (122424012503541), we get a palindrome (267729222927762).

The spelling of 145305210424221 in words is "one hundred forty-five trillion, three hundred five billion, two hundred ten million, four hundred twenty-four thousand, two hundred twenty-one".