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21012222002111 = 235094759377147
BaseRepresentation
bin1001100011100010010100…
…00001110100001110111111
32202101202012212201222010122
410301301022001310032333
510223231012313031421
6112404514224325155
74266040310050064
oct461611201641677
982352185658118
1021012222002111
11677126259501a
1224343867737bb
13b955a0702b92
14528dd5990c6b
152668995c12ab
hex131c4a0743bf

21012222002111 has 16 divisors (see below), whose sum is σ = 21973547635200. Its totient is φ = 20054892425568.

The previous prime is 21012222002087. The next prime is 21012222002159. The reversal of 21012222002111 is 11120022221012.

It is a cyclic number.

It is not a de Polignac number, because 21012222002111 - 242 = 16614175491007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012222002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012222002011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55525040 + ... + 55902186.

It is an arithmetic number, because the mean of its divisors is an integer number (1373346727200).

Almost surely, 221012222002111 is an apocalyptic number.

21012222002111 is a deficient number, since it is larger than the sum of its proper divisors (961325633089).

21012222002111 is a wasteful number, since it uses less digits than its factorization.

21012222002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382438.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012222002111 its reverse (11120022221012), we get a palindrome (32132244223123).

The spelling of 21012222002111 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two thousand, one hundred eleven".

Divisors: 1 23 509 4759 11707 109457 377147 2422331 8674381 55713613 191967823 1794842573 4415259929 41281379179 913574869657 21012222002111