25011212111 has 2 divisors, whose sum is σ = 25011212112. Its totient is φ = 25011212110.

The previous prime is 25011212101. The next prime is 25011212129. The reversal of 25011212111 is 11121211052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25011212111 - 2⁶ = 25011212047 is a prime.

It is a super-2 number, since 2×25011212111² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25011212111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25011212101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12505606055 + 12505606056.

It is an arithmetic number, because the mean of its divisors is an integer number (12505606056).

Almost surely, 2^25011212111 is an apocalyptic number.

25011212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

25011212111 is an equidigital number, since it uses as much as digits as its factorization.

25011212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 25011212111 its reverse (11121211052), we get a palindrome (36132423163).

The spelling of 25011212111 in words is "twenty-five billion, eleven million, two hundred twelve thousand, one hundred eleven".