4021221012423 has 16 divisors (see below), whose sum is σ = 5412064156416. Its totient is φ = 2655598970880.

The previous prime is 4021221012383. The next prime is 4021221012427. The reversal of 4021221012423 is 3242101221204.

It is not a de Polignac number, because 4021221012423 - 2¹⁰ = 4021221011399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021221012393 and 4021221012402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021221012427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5055303 + ... + 5796423.

It is an arithmetic number, because the mean of its divisors is an integer number (338254009776).

Almost surely, 2^{4021221012423} is an apocalyptic number.

4021221012423 is a deficient number, since it is larger than the sum of its proper divisors (1390843143993).

4021221012423 is a wasteful number, since it uses less digits than its factorization.

4021221012423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758134.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 4021221012423 its reverse (3242101221204), we get a palindrome (7263322233627).

The spelling of 4021221012423 in words is "four trillion, twenty-one billion, two hundred twenty-one million, twelve thousand, four hundred twenty-three".