25122404021 has 8 divisors (see below), whose sum is σ = 29514432864. Its totient is φ = 21081737520.

The previous prime is 25122404011. The next prime is 25122404023. The reversal of 25122404021 is 12040422152.

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

It is a cyclic number.

It is not a de Polignac number, because 25122404021 - 2¹⁴ = 25122387637 is a prime.

It is a super-2 number, since 2×25122404021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25122404023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87840431 + ... + 87840716.

It is an arithmetic number, because the mean of its divisors is an integer number (3689304108).

Almost surely, 2^25122404021 is an apocalyptic number.

It is an amenable number.

25122404021 is a deficient number, since it is larger than the sum of its proper divisors (4392028843).

25122404021 is a wasteful number, since it uses less digits than its factorization.

25122404021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175681171.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 25122404021 its reverse (12040422152), we get a palindrome (37162826173).

The spelling of 25122404021 in words is "twenty-five billion, one hundred twenty-two million, four hundred four thousand, twenty-one".