1293038291261 has 2 divisors, whose sum is σ = 1293038291262. Its totient is φ = 1293038291260.

The previous prime is 1293038291221. The next prime is 1293038291263. The reversal of 1293038291261 is 1621928303921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1235854656100 + 57183635161 = 1111690^2 + 239131^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293038291261 - 2³⁴ = 1275858422077 is a prime.

Together with 1293038291263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1293038291263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646519145630 + 646519145631.

It is an arithmetic number, because the mean of its divisors is an integer number (646519145631).

Almost surely, 2^{1293038291261} is an apocalyptic number.

It is an amenable number.

1293038291261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293038291261 is an equidigital number, since it uses as much as digits as its factorization.

1293038291261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 1293038291261 in words is "one trillion, two hundred ninety-three billion, thirty-eight million, two hundred ninety-one thousand, two hundred sixty-one".