4021221012432 has 80 divisors (see below), whose sum is σ = 11845316226240. Its totient is φ = 1164516489216.

The previous prime is 4021221012427. The next prime is 4021221012481. The reversal of 4021221012432 is 2342101221204.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189526582 + ... + 189547797.

It is an arithmetic number, because the mean of its divisors is an integer number (148066452828).

Almost surely, 2^{4021221012432} is an apocalyptic number.

It is an amenable number.

4021221012432 is an abundant number, since it is smaller than the sum of its proper divisors (7824095213808).

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

4021221012432 is a wasteful number, since it uses less digits than its factorization.

4021221012432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379074420 (or 379074414 counting only the distinct ones).

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

Adding to 4021221012432 its reverse (2342101221204), we get a palindrome (6363322233636).

The spelling of 4021221012432 in words is "four trillion, twenty-one billion, two hundred twenty-one million, twelve thousand, four hundred thirty-two".