12254151543421 has 2 divisors, whose sum is σ = 12254151543422. Its totient is φ = 12254151543420.

The previous prime is 12254151543383. The next prime is 12254151543457. The reversal of 12254151543421 is 12434515145221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6861329703396 + 5392821840025 = 2619414^2 + 2322245^2 .

It is a cyclic number.

It is not a de Polignac number, because 12254151543421 - 2¹³ = 12254151535229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12254151513421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6127075771710 + 6127075771711.

It is an arithmetic number, because the mean of its divisors is an integer number (6127075771711).

Almost surely, 2^{12254151543421} is an apocalyptic number.

It is an amenable number.

12254151543421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12254151543421 is an equidigital number, since it uses as much as digits as its factorization.

12254151543421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192000, while the sum is 40.

Adding to 12254151543421 its reverse (12434515145221), we get a palindrome (24688666688642).

The spelling of 12254151543421 in words is "twelve trillion, two hundred fifty-four billion, one hundred fifty-one million, five hundred forty-three thousand, four hundred twenty-one".