73520406121 has 16 divisors (see below), whose sum is σ = 77593631040. Its totient is φ = 69467785920.

The previous prime is 73520406103. The next prime is 73520406133. The reversal of 73520406121 is 12160402537.

It is a cyclic number.

It is not a de Polignac number, because 73520406121 - 2¹⁹ = 73519881833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73520406191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17252131 + ... + 17256391.

It is an arithmetic number, because the mean of its divisors is an integer number (4849601940).

Almost surely, 2^73520406121 is an apocalyptic number.

It is an amenable number.

73520406121 is a deficient number, since it is larger than the sum of its proper divisors (4073224919).

73520406121 is a wasteful number, since it uses less digits than its factorization.

73520406121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 73520406121 its reverse (12160402537), we get a palindrome (85680808658).

The spelling of 73520406121 in words is "seventy-three billion, five hundred twenty million, four hundred six thousand, one hundred twenty-one".