20030123131237 has 2 divisors, whose sum is σ = 20030123131238. Its totient is φ = 20030123131236.

The previous prime is 20030123131199. The next prime is 20030123131241. The reversal of 20030123131237 is 73213132103002.

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., 14498190907201 + 5531932224036 = 3807649^2 + 2352006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20030123131237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030123134237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015061565618 + 10015061565619.

It is an arithmetic number, because the mean of its divisors is an integer number (10015061565619).

Almost surely, 2^{20030123131237} is an apocalyptic number.

It is an amenable number.

20030123131237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030123131237 is an equidigital number, since it uses as much as digits as its factorization.

20030123131237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 20030123131237 its reverse (73213132103002), we get a palindrome (93243255234239).

The spelling of 20030123131237 in words is "twenty trillion, thirty billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-seven".