4021221034243 has 32 divisors (see below), whose sum is σ = 5086865746944. Its totient is φ = 3097292470272.

The previous prime is 4021221034217. The next prime is 4021221034249. The reversal of 4021221034243 is 3424301221204.

It is a de Polignac number, because none of the positive numbers 2^k-4021221034243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021221034249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154171 + ... + 2840107.

It is an arithmetic number, because the mean of its divisors is an integer number (158964554592).

Almost surely, 2^{4021221034243} is an apocalyptic number.

4021221034243 is a deficient number, since it is larger than the sum of its proper divisors (1065644712701).

4021221034243 is a wasteful number, since it uses less digits than its factorization.

4021221034243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686531.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 4021221034243 its reverse (3424301221204), we get a palindrome (7445522255447).

The spelling of 4021221034243 in words is "four trillion, twenty-one billion, two hundred twenty-one million, thirty-four thousand, two hundred forty-three".