25121233541 has 2 divisors, whose sum is σ = 25121233542. Its totient is φ = 25121233540.

The previous prime is 25121233537. The next prime is 25121233589. The reversal of 25121233541 is 14533212152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25120665025 + 568516 = 158495^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121233541 - 2² = 25121233537 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 (25121233141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560616770 + 12560616771.

It is an arithmetic number, because the mean of its divisors is an integer number (12560616771).

Almost surely, 2^25121233541 is an apocalyptic number.

It is an amenable number.

25121233541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121233541 is an equidigital number, since it uses as much as digits as its factorization.

25121233541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

Adding to 25121233541 its reverse (14533212152), we get a palindrome (39654445693).

The spelling of 25121233541 in words is "twenty-five billion, one hundred twenty-one million, two hundred thirty-three thousand, five hundred forty-one".