25121981295343 has 2 divisors, whose sum is σ = 25121981295344. Its totient is φ = 25121981295342.

The previous prime is 25121981295269. The next prime is 25121981295361. The reversal of 25121981295343 is 34359218912152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25121981295343 - 2²¹ = 25121979198191 is a prime.

It is a super-2 number, since 2×25121981295343² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25121981295143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560990647671 + 12560990647672.

It is an arithmetic number, because the mean of its divisors is an integer number (12560990647672).

Almost surely, 2^{25121981295343} is an apocalyptic number.

25121981295343 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121981295343 is an equidigital number, since it uses as much as digits as its factorization.

25121981295343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 55.

The spelling of 25121981295343 in words is "twenty-five trillion, one hundred twenty-one billion, nine hundred eighty-one million, two hundred ninety-five thousand, three hundred forty-three".