25111132121 has 2 divisors, whose sum is σ = 25111132122. Its totient is φ = 25111132120.

The previous prime is 25111132087. The next prime is 25111132201. The reversal of 25111132121 is 12123111152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15021934096 + 10089198025 = 122564^2 + 100445^2 .

It is a cyclic number.

It is not a de Polignac number, because 25111132121 - 2¹⁴ = 25111115737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25111132093 and 25111132102.

It is not a weakly prime, because it can be changed into another prime (25111132421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12555566060 + 12555566061.

It is an arithmetic number, because the mean of its divisors is an integer number (12555566061).

Almost surely, 2^25111132121 is an apocalyptic number.

It is an amenable number.

25111132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25111132121 is an equidigital number, since it uses as much as digits as its factorization.

25111132121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 20.

Adding to 25111132121 its reverse (12123111152), we get a palindrome (37234243273).

The spelling of 25111132121 in words is "twenty-five billion, one hundred eleven million, one hundred thirty-two thousand, one hundred twenty-one".