25224252123421 has 16 divisors (see below), whose sum is σ = 27254039904000. Its totient is φ = 23207256069120.

The previous prime is 25224252123409. The next prime is 25224252123431. The reversal of 25224252123421 is 12432125242252.

It is a cyclic number.

It is not a de Polignac number, because 25224252123421 - 2⁷ = 25224252123293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25224252123431) 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, 53330256 + ... + 53801158.

It is an arithmetic number, because the mean of its divisors is an integer number (1703377494000).

Almost surely, 2^{25224252123421} is an apocalyptic number.

It is an amenable number.

25224252123421 is a deficient number, since it is larger than the sum of its proper divisors (2029787780579).

25224252123421 is a wasteful number, since it uses less digits than its factorization.

25224252123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484476.

The product of its digits is 153600, while the sum is 37.

Adding to 25224252123421 its reverse (12432125242252), we get a palindrome (37656377365673).

The spelling of 25224252123421 in words is "twenty-five trillion, two hundred twenty-four billion, two hundred fifty-two million, one hundred twenty-three thousand, four hundred twenty-one".