145241351221 has 16 divisors (see below), whose sum is σ = 149229799488. Its totient is φ = 141274684800.

The previous prime is 145241351197. The next prime is 145241351251. The reversal of 145241351221 is 122153142541.

It is a cyclic number.

It is not a de Polignac number, because 145241351221 - 2⁷ = 145241351093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145241351251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30749566 + ... + 30754288.

It is an arithmetic number, because the mean of its divisors is an integer number (9326862468).

Almost surely, 2^145241351221 is an apocalyptic number.

It is an amenable number.

145241351221 is a deficient number, since it is larger than the sum of its proper divisors (3988448267).

145241351221 is a wasteful number, since it uses less digits than its factorization.

145241351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852.

The product of its digits is 9600, while the sum is 31.

Adding to 145241351221 its reverse (122153142541), we get a palindrome (267394493762).

The spelling of 145241351221 in words is "one hundred forty-five billion, two hundred forty-one million, three hundred fifty-one thousand, two hundred twenty-one".