120002131261 has 2 divisors, whose sum is σ = 120002131262. Its totient is φ = 120002131260.

The previous prime is 120002131243. The next prime is 120002131289. The reversal of 120002131261 is 162131200021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101477288025 + 18524843236 = 318555^2 + 136106^2 .

It is a cyclic number.

It is not a de Polignac number, because 120002131261 - 2⁵ = 120002131229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120002131211) 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, 60001065630 + 60001065631.

It is an arithmetic number, because the mean of its divisors is an integer number (60001065631).

Almost surely, 2^120002131261 is an apocalyptic number.

It is an amenable number.

120002131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

120002131261 is an equidigital number, since it uses as much as digits as its factorization.

120002131261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 120002131261 its reverse (162131200021), we get a palindrome (282133331282).

The spelling of 120002131261 in words is "one hundred twenty billion, two million, one hundred thirty-one thousand, two hundred sixty-one".