25331355121 has 4 divisors (see below), whose sum is σ = 26821434852. Its totient is φ = 23841275392.

The previous prime is 25331355107. The next prime is 25331355131. The reversal of 25331355121 is 12155313352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12395704896 + 12935650225 = 111336^2 + 113735^2 .

It is a cyclic number.

It is not a de Polignac number, because 25331355121 - 2²¹ = 25329257969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25331355131) 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 in 3 ways as a sum of consecutive naturals, for example, 745039840 + ... + 745039873.

It is an arithmetic number, because the mean of its divisors is an integer number (6705358713).

Almost surely, 2^25331355121 is an apocalyptic number.

It is an amenable number.

25331355121 is a deficient number, since it is larger than the sum of its proper divisors (1490079731).

25331355121 is a wasteful number, since it uses less digits than its factorization.

25331355121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490079730.

The product of its digits is 13500, while the sum is 31.

Adding to 25331355121 its reverse (12155313352), we get a palindrome (37486668473).

The spelling of 25331355121 in words is "twenty-five billion, three hundred thirty-one million, three hundred fifty-five thousand, one hundred twenty-one".