4021221011232 has 96 divisors (see below), whose sum is σ = 10815413317632. Its totient is φ = 1307614005504.

The previous prime is 4021221011153. The next prime is 4021221011267. The reversal of 4021221011232 is 2321101221204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 4021221011199 and 4021221011208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66328 + ... + 2836695.

It is an arithmetic number, because the mean of its divisors is an integer number (112660555392).

Almost surely, 2^{4021221011232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021221011232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5407706658816).

4021221011232 is an abundant number, since it is smaller than the sum of its proper divisors (6794192306400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021221011232 is a wasteful number, since it uses less digits than its factorization.

4021221011232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903390 (or 2903382 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 4021221011232 its reverse (2321101221204), we get a palindrome (6342322232436).

The spelling of 4021221011232 in words is "four trillion, twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred thirty-two".