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2001221102105 = 523110591573553
BaseRepresentation
bin11101000111110010000…
…100101010101000011001
321002022111112120021010222
4131013302010222220121
5230242000100231410
64131203121245425
7264404060462351
oct35076204525031
97068445507128
102001221102105
1170179315a985
12283a24a93875
131169395367b4
146cc06b13b61
15370ca2d5955
hex1d1f212aa19

2001221102105 has 16 divisors (see below), whose sum is σ = 2506105042560. Its totient is φ = 1531229745408.

The previous prime is 2001221102077. The next prime is 2001221102117. The reversal of 2001221102105 is 5012011221002.

It is a cyclic number.

It is not a de Polignac number, because 2001221102105 - 220 = 2001220053529 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 485009 + ... + 2058561.

It is an arithmetic number, because the mean of its divisors is an integer number (156631565160).

Almost surely, 22001221102105 is an apocalyptic number.

It is an amenable number.

2001221102105 is a deficient number, since it is larger than the sum of its proper divisors (504883940455).

2001221102105 is a wasteful number, since it uses less digits than its factorization.

2001221102105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584640.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 2001221102105 its reverse (5012011221002), we get a palindrome (7013232323107).

The spelling of 2001221102105 in words is "two trillion, one billion, two hundred twenty-one million, one hundred two thousand, one hundred five".

Divisors: 1 5 23 115 11059 55295 254357 1271785 1573553 7867765 36191719 180958595 17401922627 87009613135 400244220421 2001221102105