25121442511 has 16 divisors (see below), whose sum is σ = 27725911200. Its totient is φ = 22570662400.

The previous prime is 25121442461. The next prime is 25121442523. The reversal of 25121442511 is 11524412152.

It is not a de Polignac number, because 25121442511 - 2⁷ = 25121442383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25121442511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25121442571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2796435 + ... + 2805403.

It is an arithmetic number, because the mean of its divisors is an integer number (1732869450).

Almost surely, 2^25121442511 is an apocalyptic number.

25121442511 is a deficient number, since it is larger than the sum of its proper divisors (2604468689).

25121442511 is a wasteful number, since it uses less digits than its factorization.

25121442511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11930.

The product of its digits is 3200, while the sum is 28.

Adding to 25121442511 its reverse (11524412152), we get a palindrome (36645854663).

The spelling of 25121442511 in words is "twenty-five billion, one hundred twenty-one million, four hundred forty-two thousand, five hundred eleven".