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42401024221 = 101419812121
BaseRepresentation
bin100111011111010011…
…000100100011011101
311001110000000012112111
4213133103010203131
51143314130233341
631251225034021
73030510521263
oct473723044335
9131400005474
1042401024221
1116a89300086
128274025911
133cc963945a
1420a3416433
1511826b1681
hex9df4c48dd

42401024221 has 4 divisors (see below), whose sum is σ = 42820836444. Its totient is φ = 41981212000.

The previous prime is 42401024213. The next prime is 42401024251. The reversal of 42401024221 is 12242010424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20624119321 + 21776904900 = 143611^2 + 147570^2 .

It is a cyclic number.

It is not a de Polignac number, because 42401024221 - 23 = 42401024213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42401024192 and 42401024201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42401024251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209905960 + ... + 209906161.

It is an arithmetic number, because the mean of its divisors is an integer number (10705209111).

Almost surely, 242401024221 is an apocalyptic number.

It is an amenable number.

42401024221 is a deficient number, since it is larger than the sum of its proper divisors (419812223).

42401024221 is a wasteful number, since it uses less digits than its factorization.

42401024221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419812222.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 42401024221 its reverse (12242010424), we get a palindrome (54643034645).

The spelling of 42401024221 in words is "forty-two billion, four hundred one million, twenty-four thousand, two hundred twenty-one".

Divisors: 1 101 419812121 42401024221