1251343521341 has 2 divisors, whose sum is σ = 1251343521342. Its totient is φ = 1251343521340.

The previous prime is 1251343521319. The next prime is 1251343521347. The reversal of 1251343521341 is 1431253431521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 983609716441 + 267733804900 = 991771^2 + 517430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251343521341 - 2⁶ = 1251343521277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251343521347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625671760670 + 625671760671.

It is an arithmetic number, because the mean of its divisors is an integer number (625671760671).

Almost surely, 2^{1251343521341} is an apocalyptic number.

It is an amenable number.

1251343521341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251343521341 is an equidigital number, since it uses as much as digits as its factorization.

1251343521341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

Adding to 1251343521341 its reverse (1431253431521), we get a palindrome (2682596952862).

The spelling of 1251343521341 in words is "one trillion, two hundred fifty-one billion, three hundred forty-three million, five hundred twenty-one thousand, three hundred forty-one".