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21220111221607 = 424111743426089
BaseRepresentation
bin1001101001100101100010…
…01100010000001101100111
32210010121211000222112020201
410310302301030100031213
510240132241433042412
6113044215020011331
74320050065212034
oct464626114201547
983117730875221
1021220111221607
116841442639631
122468724390b47
13bac08131876c
145350b774038b
1526beb545be57
hex134cb1310367

21220111221607 has 8 divisors (see below), whose sum is σ = 21226972072320. Its totient is φ = 21213251255040.

The previous prime is 21220111221581. The next prime is 21220111221679. The reversal of 21220111221607 is 70612211102212.

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 21220111221607 - 27 = 21220111221479 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 (21220111221697) 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, 49589019 + ... + 50015107.

It is an arithmetic number, because the mean of its divisors is an integer number (2653371509040).

Almost surely, 221220111221607 is an apocalyptic number.

21220111221607 is a deficient number, since it is larger than the sum of its proper divisors (6860850713).

21220111221607 is a wasteful number, since it uses less digits than its factorization.

21220111221607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442073.

The product of its (nonzero) digits is 1344, while the sum is 28.

Adding to 21220111221607 its reverse (70612211102212), we get a palindrome (91832322323819).

The spelling of 21220111221607 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, six hundred seven".

Divisors: 1 4241 11743 426089 49802063 1807043449 5003563127 21220111221607