4221002325421 has 4 divisors (see below), whose sum is σ = 4824002657632. Its totient is φ = 3618001993212.

The previous prime is 4221002325401. The next prime is 4221002325431. The reversal of 4221002325421 is 1245232001224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4221002325421 - 2⁹ = 4221002324909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221002325421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221002325401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301500166095 + ... + 301500166108.

It is an arithmetic number, because the mean of its divisors is an integer number (1206000664408).

Almost surely, 2^{4221002325421} is an apocalyptic number.

It is an amenable number.

4221002325421 is a deficient number, since it is larger than the sum of its proper divisors (603000332211).

4221002325421 is an equidigital number, since it uses as much as digits as its factorization.

4221002325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603000332210.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 4221002325421 its reverse (1245232001224), we get a palindrome (5466234326645).

The spelling of 4221002325421 in words is "four trillion, two hundred twenty-one billion, two million, three hundred twenty-five thousand, four hundred twenty-one".