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22221212122 = 211110606061
BaseRepresentation
bin10100101100011111…
…001100100111011010
32010100122010112110101
4110230133030213122
5331002112241442
614112553410014
71414443120664
oct245437144732
963318115411
1022221212122
11947332761a
124381a0990a
132131925335
14110b2c5534
158a0c77cb7
hex52c7cc9da

22221212122 has 4 divisors (see below), whose sum is σ = 33331818186. Its totient is φ = 11110606060.

The previous prime is 22221212113. The next prime is 22221212129. The reversal of 22221212122 is 22121212222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22121212222 = 211060606111.

It can be written as a sum of positive squares in only one way, i.e., 21655771281 + 565440841 = 147159^2 + 23779^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22221212122.

It is not an unprimeable number, because it can be changed into a prime (22221212129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555303029 + ... + 5555303032.

Almost surely, 222221212122 is an apocalyptic number.

22221212122 is a deficient number, since it is larger than the sum of its proper divisors (11110606064).

22221212122 is a wasteful number, since it uses less digits than its factorization.

22221212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110606063.

The product of its digits is 256, while the sum is 19.

Adding to 22221212122 its reverse (22121212222), we get a palindrome (44342424344).

It can be divided in two parts, 22 and 221212122, that multiplied together give a palindrome (4866666684).

The spelling of 22221212122 in words is "twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".

Divisors: 1 2 11110606061 22221212122