20310610121 has 4 divisors (see below), whose sum is σ = 20333665044. Its totient is φ = 20287555200.

The previous prime is 20310610097. The next prime is 20310610123. The reversal of 20310610121 is 12101601302.

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 12240103225 + 8070506896 = 110635^2 + 89836^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310610121 - 2⁶ = 20310610057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20310610121.

It is not an unprimeable number, because it can be changed into a prime (20310610123) 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 3 ways as a sum of consecutive naturals, for example, 11526140 + ... + 11527901.

It is an arithmetic number, because the mean of its divisors is an integer number (5083416261).

Almost surely, 2^20310610121 is an apocalyptic number.

It is an amenable number.

20310610121 is a deficient number, since it is larger than the sum of its proper divisors (23054923).

20310610121 is an equidigital number, since it uses as much as digits as its factorization.

20310610121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23054922.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20310610121 in words is "twenty billion, three hundred ten million, six hundred ten thousand, one hundred twenty-one".