4221021042 has 48 divisors (see below), whose sum is σ = 10906496640. Its totient is φ = 1153570176.

The previous prime is 4221021041. The next prime is 4221021131. The reversal of 4221021042 is 2401201224.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 725367 + ... + 731162.

It is an arithmetic number, because the mean of its divisors is an integer number (227218680).

Almost surely, 2^4221021042 is an apocalyptic number.

4221021042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

4221021042 is an abundant number, since it is smaller than the sum of its proper divisors (6685475598).

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

4221021042 is a wasteful number, since it uses less digits than its factorization.

4221021042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456567 (or 1456564 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 4221021042 is about 64969.3854211351. The cubic root of 4221021042 is about 1616.1159099068.

Adding to 4221021042 its reverse (2401201224), we get a palindrome (6622222266).

The spelling of 4221021042 in words is "four billion, two hundred twenty-one million, twenty-one thousand, forty-two".