545221210121 has 8 divisors (see below), whose sum is σ = 629159566464. Its totient is φ = 462795256800.

The previous prime is 545221210063. The next prime is 545221210123. The reversal of 545221210121 is 121012122545.

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 545221210121 - 2¹⁸ = 545220947977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545221210123) 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, 378099980 + ... + 378101421.

It is an arithmetic number, because the mean of its divisors is an integer number (78644945808).

Almost surely, 2^545221210121 is an apocalyptic number.

It is an amenable number.

545221210121 is a deficient number, since it is larger than the sum of its proper divisors (83938356343).

545221210121 is a wasteful number, since it uses less digits than its factorization.

545221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756201511.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 545221210121 its reverse (121012122545), we get a palindrome (666233332666).

The spelling of 545221210121 in words is "five hundred forty-five billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".