1303231002181 has 2 divisors, whose sum is σ = 1303231002182. Its totient is φ = 1303231002180.

The previous prime is 1303231002119. The next prime is 1303231002187. The reversal of 1303231002181 is 1812001323031.

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., 1102311008100 + 200919994081 = 1049910^2 + 448241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303231002181 - 2³⁷ = 1165792048709 is a prime.

It is a super-2 number, since 2×1303231002181² (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 (1303231002187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651615501090 + 651615501091.

It is an arithmetic number, because the mean of its divisors is an integer number (651615501091).

Almost surely, 2^{1303231002181} is an apocalyptic number.

It is an amenable number.

1303231002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303231002181 is an equidigital number, since it uses as much as digits as its factorization.

1303231002181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 1303231002181 in words is "one trillion, three hundred three billion, two hundred thirty-one million, two thousand, one hundred eighty-one".