1231140077273 has 2 divisors, whose sum is σ = 1231140077274. Its totient is φ = 1231140077272.

The previous prime is 1231140077227. The next prime is 1231140077303. The reversal of 1231140077273 is 3727700411321.

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., 1200104913049 + 31035164224 = 1095493^2 + 176168^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231140077273 - 2¹⁰ = 1231140076249 is a prime.

It is a super-2 number, since 2×1231140077273² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231140077213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615570038636 + 615570038637.

It is an arithmetic number, because the mean of its divisors is an integer number (615570038637).

Almost surely, 2^{1231140077273} is an apocalyptic number.

It is an amenable number.

1231140077273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231140077273 is an equidigital number, since it uses as much as digits as its factorization.

1231140077273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 38.

Adding to 1231140077273 its reverse (3727700411321), we get a palindrome (4958840488594).

The spelling of 1231140077273 in words is "one trillion, two hundred thirty-one billion, one hundred forty million, seventy-seven thousand, two hundred seventy-three".