1231530401293 has 2 divisors, whose sum is σ = 1231530401294. Its totient is φ = 1231530401292.

The previous prime is 1231530401291. The next prime is 1231530401377. The reversal of 1231530401293 is 3921040351321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214355512484 + 17174888809 = 1101978^2 + 131053^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231530401293 - 2¹ = 1231530401291 is a prime.

Together with 1231530401291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231530401291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615765200646 + 615765200647.

It is an arithmetic number, because the mean of its divisors is an integer number (615765200647).

Almost surely, 2^{1231530401293} is an apocalyptic number.

It is an amenable number.

1231530401293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231530401293 is an equidigital number, since it uses as much as digits as its factorization.

1231530401293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 1231530401293 in words is "one trillion, two hundred thirty-one billion, five hundred thirty million, four hundred one thousand, two hundred ninety-three".