31120302010121 has 2 divisors, whose sum is σ = 31120302010122. Its totient is φ = 31120302010120.

The previous prime is 31120302010079. The next prime is 31120302010123. The reversal of 31120302010121 is 12101020302113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17239610547721 + 13880691462400 = 4152061^2 + 3725680^2 .

It is an emirp because it is prime and its reverse (12101020302113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31120302010121 is a prime.

It is a super-2 number, since 2×31120302010121² (a number of 28 digits) contains 22 as substring.

Together with 31120302010123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31120302010121.

It is not a weakly prime, because it can be changed into another prime (31120302010123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560151005060 + 15560151005061.

It is an arithmetic number, because the mean of its divisors is an integer number (15560151005061).

Almost surely, 2^{31120302010121} is an apocalyptic number.

It is an amenable number.

31120302010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120302010121 is an equidigital number, since it uses as much as digits as its factorization.

31120302010121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31120302010121 its reverse (12101020302113), we get a palindrome (43221322312234).

The spelling of 31120302010121 in words is "thirty-one trillion, one hundred twenty billion, three hundred two million, ten thousand, one hundred twenty-one".