25230121202221 has 16 divisors (see below), whose sum is σ = 28522759749120. Its totient is φ = 22156072263360.

The previous prime is 25230121202219. The next prime is 25230121202263. The reversal of 25230121202221 is 12220212103252.

It is a cyclic number.

It is not a de Polignac number, because 25230121202221 - 2¹ = 25230121202219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25230121202291) 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 15 ways as a sum of consecutive naturals, for example, 530533510 + ... + 530581063.

It is an arithmetic number, because the mean of its divisors is an integer number (1782672484320).

Almost surely, 2^{25230121202221} is an apocalyptic number.

It is an amenable number.

25230121202221 is a deficient number, since it is larger than the sum of its proper divisors (3292638546899).

25230121202221 is a wasteful number, since it uses less digits than its factorization.

25230121202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061114676.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 25230121202221 its reverse (12220212103252), we get a palindrome (37450333305473).

The spelling of 25230121202221 in words is "twenty-five trillion, two hundred thirty billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".