4221021040 has 80 divisors (see below), whose sum is σ = 10066320000. Its totient is φ = 1645168896.

The previous prime is 4221021031. The next prime is 4221021041. The reversal of 4221021040 is 401201224.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221021041) 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, 1715331 + ... + 1717789.

It is an arithmetic number, because the mean of its divisors is an integer number (125829000).

Almost surely, 2^4221021040 is an apocalyptic number.

4221021040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5033160000).

4221021040 is an abundant number, since it is smaller than the sum of its proper divisors (5845298960).

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

4221021040 is a wasteful number, since it uses less digits than its factorization.

4221021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014 (or 3008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4221021040 is about 64969.3854057432. The cubic root of 4221021040 is about 1616.1159096516.

Adding to 4221021040 its reverse (401201224), we get a palindrome (4622222264).

The spelling of 4221021040 in words is "four billion, two hundred twenty-one million, twenty-one thousand, forty".