610520320121 has 4 divisors (see below), whose sum is σ = 610531099044. Its totient is φ = 610509541200.

The previous prime is 610520320117. The next prime is 610520320213. The reversal of 610520320121 is 121023025016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 490890804496 + 119629515625 = 700636^2 + 345875^2 .

It is a cyclic number.

It is not a de Polignac number, because 610520320121 - 2² = 610520320117 is a prime.

It is a super-2 number, since 2×610520320121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610520323121) 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 3 ways as a sum of consecutive naturals, for example, 5304050 + ... + 5417931.

It is an arithmetic number, because the mean of its divisors is an integer number (152632774761).

Almost surely, 2^610520320121 is an apocalyptic number.

It is an amenable number.

610520320121 is a deficient number, since it is larger than the sum of its proper divisors (10778923).

610520320121 is a wasteful number, since it uses less digits than its factorization.

610520320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778922.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 610520320121 its reverse (121023025016), we get a palindrome (731543345137).

The spelling of 610520320121 in words is "six hundred ten billion, five hundred twenty million, three hundred twenty thousand, one hundred twenty-one".