Search a number
-
+
20001201210021 = 329294341781063
BaseRepresentation
bin1001000110000111001000…
…11111100100001010100101
32121211002121002202022000210
410203003210133210022211
510110144430002210041
6110312231444130033
74133016261106623
oct443034437441245
977732532668023
1020001201210021
11641150971a999
1222b0449996919
13b2114a10cbb5
144d20c59c4513
1524a425560016
hex1230e47e42a5

20001201210021 has 16 divisors (see below), whose sum is σ = 27587992786560. Its totient is φ = 12874276188480.

The previous prime is 20001201209959. The next prime is 20001201210037. The reversal of 20001201210021 is 12001210210002.

It is not a de Polignac number, because 20001201210021 - 237 = 19863762256549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001201209979 and 20001201210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001201210521) 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, 25217136 + ... + 25998198.

It is an arithmetic number, because the mean of its divisors is an integer number (1724249549160).

Almost surely, 220001201210021 is an apocalyptic number.

It is an amenable number.

20001201210021 is a deficient number, since it is larger than the sum of its proper divisors (7586791576539).

20001201210021 is a wasteful number, since it uses less digits than its factorization.

20001201210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075436.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001201210021 its reverse (12001210210002), we get a palindrome (32002411420023).

The spelling of 20001201210021 in words is "twenty trillion, one billion, two hundred one million, two hundred ten thousand, twenty-one".

Divisors: 1 3 29 87 294341 781063 883023 2343189 8535889 22650827 25607667 67952481 229898864483 689696593449 6667067070007 20001201210021