1301201002181 has 2 divisors, whose sum is σ = 1301201002182. Its totient is φ = 1301201002180.

The previous prime is 1301201002151. The next prime is 1301201002267. The reversal of 1301201002181 is 1812001021031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723578201956 + 577622800225 = 850634^2 + 760015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301201002181 - 2²⁶ = 1301133893317 is a prime.

It is a super-2 number, since 2×1301201002181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301201002151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650600501090 + 650600501091.

It is an arithmetic number, because the mean of its divisors is an integer number (650600501091).

Almost surely, 2^{1301201002181} is an apocalyptic number.

It is an amenable number.

1301201002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301201002181 is an equidigital number, since it uses as much as digits as its factorization.

1301201002181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

The spelling of 1301201002181 in words is "one trillion, three hundred one billion, two hundred one million, two thousand, one hundred eighty-one".