12011021001257 has 2 divisors, whose sum is σ = 12011021001258. Its totient is φ = 12011021001256.

The previous prime is 12011021001173. The next prime is 12011021001281. The reversal of 12011021001257 is 75210012011021.

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., 10507996492816 + 1503024508441 = 3241604^2 + 1225979^2 .

It is an emirp because it is prime and its reverse (75210012011021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12011021001257 - 2³⁶ = 11942301524521 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011021001157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005510500628 + 6005510500629.

It is an arithmetic number, because the mean of its divisors is an integer number (6005510500629).

Almost surely, 2^{12011021001257} is an apocalyptic number.

It is an amenable number.

12011021001257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011021001257 is an equidigital number, since it uses as much as digits as its factorization.

12011021001257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 12011021001257 its reverse (75210012011021), we get a palindrome (87221033012278).

The spelling of 12011021001257 in words is "twelve trillion, eleven billion, twenty-one million, one thousand, two hundred fifty-seven".