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21213543315107 = 1113421735178197
BaseRepresentation
bin1001101001011001010011…
…01101101011011010100011
32210002222212022022022022102
410310230221231223122203
510240030314042040412
6113041211155001015
74316425244012423
oct464545155533243
983088768268272
1021213543315107
116839682190230
1224673b089916b
13bab5756acc60
14534a53340483
1526bc2da458c2
hex134b29b6b6a3

21213543315107 has 16 divisors (see below), whose sum is σ = 24928115379552. Its totient is φ = 17797352920320.

The previous prime is 21213543315073. The next prime is 21213543315143. The reversal of 21213543315107 is 70151334531212.

It is a cyclic number.

It is not a de Polignac number, because 21213543315107 - 232 = 21209248347811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213543315607) 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, 16986068 + ... + 18192129.

It is an arithmetic number, because the mean of its divisors is an integer number (1558007211222).

Almost surely, 221213543315107 is an apocalyptic number.

21213543315107 is a deficient number, since it is larger than the sum of its proper divisors (3714572064445).

21213543315107 is a wasteful number, since it uses less digits than its factorization.

21213543315107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35182438.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 21213543315107 its reverse (70151334531212), we get a palindrome (91364877846319).

The spelling of 21213543315107 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, one hundred seven".

Divisors: 1 11 13 143 4217 46387 54821 603031 35178197 386960167 457316561 5030482171 148346456749 1631811024239 1928503937737 21213543315107