4221240421225 has 48 divisors (see below), whose sum is σ = 5425328113920. Its totient is φ = 3254231232000.

The previous prime is 4221240421219. The next prime is 4221240421243. The reversal of 4221240421225 is 5221240421224.

It is not a de Polignac number, because 4221240421225 - 2¹⁵ = 4221240388457 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1480616050 + ... + 1480618900.

It is an arithmetic number, because the mean of its divisors is an integer number (113027669040).

Almost surely, 2^{4221240421225} is an apocalyptic number.

It is an amenable number.

4221240421225 is a deficient number, since it is larger than the sum of its proper divisors (1204087692695).

4221240421225 is a wasteful number, since it uses less digits than its factorization.

4221240421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6130 (or 6125 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 4221240421225 its reverse (5221240421224), we get a palindrome (9442480842449).

Subtracting 4221240421225 from its reverse (5221240421224), we obtain a palindrome (999999999999).

The spelling of 4221240421225 in words is "four trillion, two hundred twenty-one billion, two hundred forty million, four hundred twenty-one thousand, two hundred twenty-five".