4221401240021 has 8 divisors (see below), whose sum is σ = 4825514970240. Its totient is φ = 3617551612368.

The previous prime is 4221401239997. The next prime is 4221401240033. The reversal of 4221401240021 is 1200421041224.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221401240021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221401240041) 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, 65991386 + ... + 66055323.

It is an arithmetic number, because the mean of its divisors is an integer number (603189371280).

Almost surely, 2^{4221401240021} is an apocalyptic number.

It is an amenable number.

4221401240021 is a deficient number, since it is larger than the sum of its proper divisors (604113730219).

4221401240021 is a wasteful number, since it uses less digits than its factorization.

4221401240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132051283.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 4221401240021 its reverse (1200421041224), we get a palindrome (5421822281245).

The spelling of 4221401240021 in words is "four trillion, two hundred twenty-one billion, four hundred one million, two hundred forty thousand, twenty-one".