Search a number
-
+
21222221121211 = 113176086097253
BaseRepresentation
bin1001101001101001011101…
…11100111000011010111011
32210010211021002010112101111
410310310232330320122323
510240201102101334321
6113045204230301151
74320153265106605
oct464645674703273
983124232115344
1021222221121211
116842325619410
122469012ab77b7
13bac329491576
14535237a46175
1526c08a7cc5e1
hex134d2ef386bb

21222221121211 has 8 divisors (see below), whose sum is σ = 23224547121264. Its totient is φ = 19232067316320.

The previous prime is 21222221121203. The next prime is 21222221121221. The reversal of 21222221121211 is 11212112222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222221121211 - 23 = 21222221121203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222221121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3043045140 + ... + 3043052113.

It is an arithmetic number, because the mean of its divisors is an integer number (2903068390158).

Almost surely, 221222221121211 is an apocalyptic number.

21222221121211 is a deficient number, since it is larger than the sum of its proper divisors (2002326000053).

21222221121211 is a wasteful number, since it uses less digits than its factorization.

21222221121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086097581.

The product of its digits is 256, while the sum is 22.

Adding to 21222221121211 its reverse (11212112222212), we get a palindrome (32434333343423).

The spelling of 21222221121211 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".

Divisors: 1 11 317 3487 6086097253 66947069783 1929292829201 21222221121211