45450221021 has 16 divisors (see below), whose sum is σ = 48255637248. Its totient is φ = 42659635200.

The previous prime is 45450221009. The next prime is 45450221027. The reversal of 45450221021 is 12012205454.

It is a cyclic number.

It is not a de Polignac number, because 45450221021 - 2¹⁸ = 45449958877 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 (45450221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11886716 + ... + 11890538.

It is an arithmetic number, because the mean of its divisors is an integer number (3015977328).

Almost surely, 2^45450221021 is an apocalyptic number.

It is an amenable number.

45450221021 is a deficient number, since it is larger than the sum of its proper divisors (2805416227).

45450221021 is a wasteful number, since it uses less digits than its factorization.

45450221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 45450221021 its reverse (12012205454), we get a palindrome (57462426475).

The spelling of 45450221021 in words is "forty-five billion, four hundred fifty million, two hundred twenty-one thousand, twenty-one".