25121400011 has 2 divisors, whose sum is σ = 25121400012. Its totient is φ = 25121400010.

The previous prime is 25121399983. The next prime is 25121400079. The reversal of 25121400011 is 11000412152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25121400011 is a prime.

It is not a weakly prime, because it can be changed into another prime (25121402011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560700005 + 12560700006.

It is an arithmetic number, because the mean of its divisors is an integer number (12560700006).

Almost surely, 2^25121400011 is an apocalyptic number.

25121400011 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121400011 is an equidigital number, since it uses as much as digits as its factorization.

25121400011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 25121400011 its reverse (11000412152), we get a palindrome (36121812163).

The spelling of 25121400011 in words is "twenty-five billion, one hundred twenty-one million, four hundred thousand, eleven".