Base | Representation |
---|---|
bin | 10011110000110011… |
… | …111101011101010100 |
3 | 2000202212012210221110 |
4 | 103300303331131110 |
5 | 321424311201400 |
6 | 13425350415020 |
7 | 1350565132434 |
oct | 236063753524 |
9 | 60685183843 |
10 | 21220022100 |
11 | 8aaa170752 |
12 | 4142661470 |
13 | 200238c5c4 |
14 | 10543482c4 |
15 | 842e0de50 |
hex | 4f0cfd754 |
21220022100 has 72 divisors (see below), whose sum is σ = 63513747360. Its totient is φ = 5463543680.
The previous prime is 21220022077. The next prime is 21220022119. The reversal of 21220022100 is 122002212.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1210842 + ... + 1228241.
It is an arithmetic number, because the mean of its divisors is an integer number (882135380).
Almost surely, 221220022100 is an apocalyptic number.
21220022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
21220022100 is an abundant number, since it is smaller than the sum of its proper divisors (42293725260).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21220022100 is a wasteful number, since it uses less digits than its factorization.
21220022100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2439129 (or 2439122 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 12.
Adding to 21220022100 its reverse (122002212), we get a palindrome (21342024312).
The spelling of 21220022100 in words is "twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred".
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