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1001000221021 = 194713910517673
BaseRepresentation
bin11101001000100000100…
…00110011100101011101
310112200202102111220210001
432210100100303211131
5112400022024033041
62043504140414301
7132214501330213
oct16442020634535
93480672456701
101001000221021
1135658158a839
12142000b47391
13735175824b8
143663d210cb3
151b08948d131
hexe91043395d

1001000221021 has 32 divisors (see below), whose sum is σ = 1085017651200. Its totient is φ = 920465078400.

The previous prime is 1001000220959. The next prime is 1001000221027. The reversal of 1001000221021 is 1201220001001.

It is a cyclic number.

It is not a de Polignac number, because 1001000221021 - 29 = 1001000220509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001000220989 and 1001000221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001000221027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130453641 + ... + 130461313.

It is an arithmetic number, because the mean of its divisors is an integer number (33906801600).

Almost surely, 21001000221021 is an apocalyptic number.

It is an amenable number.

1001000221021 is a deficient number, since it is larger than the sum of its proper divisors (84017430179).

1001000221021 is a wasteful number, since it uses less digits than its factorization.

1001000221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001000221021 its reverse (1201220001001), we get a palindrome (2202220222022).

The spelling of 1001000221021 in words is "one trillion, one billion, two hundred twenty-one thousand, twenty-one".

Divisors: 1 19 47 139 893 1051 2641 6533 7673 19969 49397 124127 145787 146089 360631 938543 1066547 2775691 6851989 6866183 8064323 20264393 50127709 130457477 153222137 379023181 952426471 1120940897 7201440439 21297877043 52684222159 1001000221021