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4221021021 = 37296931069
BaseRepresentation
bin1111101110010111…
…1010101101011101
3101220011121002021220
43323211322231131
532121040133041
61534503043553
7206413041510
oct37345725535
911804532256
104221021021
111876724628
129997405b9
13523658a99
142c0848d77
1519a882d66
hexfb97ab5d

4221021021 has 16 divisors (see below), whose sum is σ = 6653827200. Its totient is φ = 2328838848.

The previous prime is 4221020983. The next prime is 4221021031. The reversal of 4221021021 is 1201201224.

4221021021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4221021021 - 210 = 4221019997 is a prime.

4221021021 is a modest number, since divided by 21021 gives 4221 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221021031) 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, 3464926 + ... + 3466143.

It is an arithmetic number, because the mean of its divisors is an integer number (415864200).

Almost surely, 24221021021 is an apocalyptic number.

It is an amenable number.

4221021021 is a deficient number, since it is larger than the sum of its proper divisors (2432806179).

4221021021 is a wasteful number, since it uses less digits than its factorization.

4221021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931108.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 4221021021 is about 64969.3852595205. The cubic root of 4221021021 is about 1616.1159072267.

Adding to 4221021021 its reverse (1201201224), we get a palindrome (5422222245).

The spelling of 4221021021 in words is "four billion, two hundred twenty-one million, twenty-one thousand, twenty-one".

Divisors: 1 3 7 21 29 87 203 609 6931069 20793207 48517483 145552449 201001001 603003003 1407007007 4221021021