Search a number
2220111101 = 131043316369
BaseRepresentation
bin1000010001010100…
…0011010011111101
312201201112022220002
42010111003103331
514021322023401
61004144404045
7106005430055
oct20425032375
95651468802
102220111101
11a3a21636a
1251b616625
13294c53510
14170bd4565
15ced90a6b
hex845434fd

2220111101 has 8 divisors (see below), whose sum is σ = 2391264120. Its totient is φ = 2049011712.

The previous prime is 2220111079. The next prime is 2220111121. The reversal of 2220111101 is 1011110222.

It can be written as a sum of positive squares in 4 ways, for example, as 68079001 + 2152032100 = 8251^2 + 46390^2 .

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 2220111101 - 214 = 2220094717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220111121) 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, 127445 + ... + 143813.

It is an arithmetic number, because the mean of its divisors is an integer number (298908015).

Almost surely, 22220111101 is an apocalyptic number.

It is an amenable number.

2220111101 is a deficient number, since it is larger than the sum of its proper divisors (171153019).

2220111101 is a wasteful number, since it uses less digits than its factorization.

2220111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26815.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2220111101 is about 47118.0549365103. The cubic root of 2220111101 is about 1304.5425114532.

Adding to 2220111101 its reverse (1011110222), we get a palindrome (3231221323).

It can be divided in two parts, 22201 and 11101, that multiplied together give a triangular number (246453301 = T22201).

The spelling of 2220111101 in words is "two billion, two hundred twenty million, one hundred eleven thousand, one hundred one".