1145421111521 has 8 divisors (see below), whose sum is σ = 1235113908000. Its totient is φ = 1058669062560.

The previous prime is 1145421111487. The next prime is 1145421111533. The reversal of 1145421111521 is 1251111245411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145421111521 - 2¹⁰ = 1145421110497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145421114521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735186071 + ... + 735187628.

It is an arithmetic number, because the mean of its divisors is an integer number (154389238500).

Almost surely, 2^{1145421111521} is an apocalyptic number.

It is an amenable number.

1145421111521 is a deficient number, since it is larger than the sum of its proper divisors (89692796479).

1145421111521 is a wasteful number, since it uses less digits than its factorization.

1145421111521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470373759.

The product of its digits is 1600, while the sum is 29.

Adding to 1145421111521 its reverse (1251111245411), we get a palindrome (2396532356932).

The spelling of 1145421111521 in words is "one trillion, one hundred forty-five billion, four hundred twenty-one million, one hundred eleven thousand, five hundred twenty-one".