1210001310121 has 2 divisors, whose sum is σ = 1210001310122. Its totient is φ = 1210001310120.

The previous prime is 1210001310047. The next prime is 1210001310131. The reversal of 1210001310121 is 1210131000121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172750380096 + 37250930025 = 1082936^2 + 193005^2 .

It is an emirp because it is prime and its reverse (1210131000121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210001310121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210001310131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000655060 + 605000655061.

It is an arithmetic number, because the mean of its divisors is an integer number (605000655061).

Almost surely, 2^{1210001310121} is an apocalyptic number.

It is an amenable number.

1210001310121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210001310121 is an equidigital number, since it uses as much as digits as its factorization.

1210001310121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1210001310121 its reverse (1210131000121), we get a palindrome (2420132310242).

The spelling of 1210001310121 in words is "one trillion, two hundred ten billion, one million, three hundred ten thousand, one hundred twenty-one".