25041222021 has 8 divisors (see below), whose sum is σ = 33389078080. Its totient is φ = 16693756992.

The previous prime is 25041222001. The next prime is 25041222023. The reversal of 25041222021 is 12022214052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25041222021 - 2¹⁸ = 25040959877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25041222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122685 + ... + 255213.

It is an arithmetic number, because the mean of its divisors is an integer number (4173634760).

Almost surely, 2^25041222021 is an apocalyptic number.

It is an amenable number.

25041222021 is a deficient number, since it is larger than the sum of its proper divisors (8347856059).

25041222021 is a wasteful number, since it uses less digits than its factorization.

25041222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195515.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 25041222021 its reverse (12022214052), we get a palindrome (37063436073).

The spelling of 25041222021 in words is "twenty-five billion, forty-one million, two hundred twenty-two thousand, twenty-one".