1231242201437 has 2 divisors, whose sum is σ = 1231242201438. Its totient is φ = 1231242201436.

The previous prime is 1231242201389. The next prime is 1231242201457. The reversal of 1231242201437 is 7341022421321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227816908761 + 3425292676 = 1108069^2 + 58526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231242201437 - 2⁶ = 1231242201373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231242201457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615621100718 + 615621100719.

It is an arithmetic number, because the mean of its divisors is an integer number (615621100719).

Almost surely, 2^{1231242201437} is an apocalyptic number.

It is an amenable number.

1231242201437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231242201437 is an equidigital number, since it uses as much as digits as its factorization.

1231242201437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 1231242201437 its reverse (7341022421321), we get a palindrome (8572264622758).

The spelling of 1231242201437 in words is "one trillion, two hundred thirty-one billion, two hundred forty-two million, two hundred one thousand, four hundred thirty-seven".