4021221012442 has 8 divisors (see below), whose sum is σ = 6031863473076. Its totient is φ = 2010599854752.

The previous prime is 4021221012427. The next prime is 4021221012481. The reversal of 4021221012442 is 2442101221204.

It can be written as a sum of positive squares in 2 ways, for example, as 3876059250441 + 145161762001 = 1968771^2 + 381001^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4845153 + ... + 5614084.

Almost surely, 2^{4021221012442} is an apocalyptic number.

4021221012442 is a deficient number, since it is larger than the sum of its proper divisors (2010642460634).

4021221012442 is a wasteful number, since it uses less digits than its factorization.

4021221012442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651472.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 4021221012442 its reverse (2442101221204), we get a palindrome (6463322233646).

The spelling of 4021221012442 in words is "four trillion, twenty-one billion, two hundred twenty-one million, twelve thousand, four hundred forty-two".