4545221121 has 40 divisors (see below), whose sum is σ = 7809320640. Its totient is φ = 2580675552.

The previous prime is 4545221101. The next prime is 4545221143. The reversal of 4545221121 is 1211225454.

It is a happy number.

4545221121 is a `hidden beast` number, since 4 + 545 + 2 + 2 + 112 + 1 = 666.

It is not a de Polignac number, because 4545221121 - 2⁷ = 4545220993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4545221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63490 + ... + 114548.

It is an arithmetic number, because the mean of its divisors is an integer number (195233016).

Almost surely, 2^4545221121 is an apocalyptic number.

It is an amenable number.

4545221121 is a deficient number, since it is larger than the sum of its proper divisors (3264099519).

4545221121 is a wasteful number, since it uses less digits than its factorization.

4545221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51235 (or 51226 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 4545221121 is about 67418.2551020122. The cubic root of 4545221121 is about 1656.4754561845.

Adding to 4545221121 its reverse (1211225454), we get a palindrome (5756446575).

The spelling of 4545221121 in words is "four billion, five hundred forty-five million, two hundred twenty-one thousand, one hundred twenty-one".