545445022121 has 4 divisors (see below), whose sum is σ = 546413841552. Its totient is φ = 544476202692.

The previous prime is 545445022091. The next prime is 545445022127. The reversal of 545445022121 is 121220544545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121220544545 = 5 ⋅24244108909.

It is a cyclic number.

It is not a de Polignac number, because 545445022121 - 2²² = 545440827817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545445022127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484408871 + ... + 484409996.

It is an arithmetic number, because the mean of its divisors is an integer number (136603460388).

Almost surely, 2^545445022121 is an apocalyptic number.

It is an amenable number.

545445022121 is a deficient number, since it is larger than the sum of its proper divisors (968819431).

545445022121 is an equidigital number, since it uses as much as digits as its factorization.

545445022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968819430.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 545445022121 its reverse (121220544545), we get a palindrome (666665566666).

The spelling of 545445022121 in words is "five hundred forty-five billion, four hundred forty-five million, twenty-two thousand, one hundred twenty-one".