1231542210443 has 2 divisors, whose sum is σ = 1231542210444. Its totient is φ = 1231542210442.

The previous prime is 1231542210439. The next prime is 1231542210601. The reversal of 1231542210443 is 3440122451321.

It is a weak prime.

It is an emirp because it is prime and its reverse (3440122451321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231542210443 - 2² = 1231542210439 is a prime.

It is a super-2 number, since 2×1231542210443² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231542210643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615771105221 + 615771105222.

It is an arithmetic number, because the mean of its divisors is an integer number (615771105222).

Almost surely, 2^{1231542210443} is an apocalyptic number.

1231542210443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231542210443 is an equidigital number, since it uses as much as digits as its factorization.

1231542210443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1231542210443 its reverse (3440122451321), we get a palindrome (4671664661764).

The spelling of 1231542210443 in words is "one trillion, two hundred thirty-one billion, five hundred forty-two million, two hundred ten thousand, four hundred forty-three".