Search a number
-
+
12021210123 = 3132910979689
BaseRepresentation
bin10110011001000010…
…10001110000001011
31011000210000202011120
423030201101300023
5144104412210443
65304504130323
7603616412556
oct131441216013
934023022146
1012021210123
1151097290aa
1223b5a669a3
13119767c9b0
1482077d69d
154a5560083
hex2cc851c0b

12021210123 has 32 divisors (see below), whose sum is σ = 17874561600. Its totient is φ = 7135328256.

The previous prime is 12021210059. The next prime is 12021210167. The reversal of 12021210123 is 32101212021.

It is not a de Polignac number, because 12021210123 - 26 = 12021210059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021210623) 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, 1235863 + ... + 1245551.

It is an arithmetic number, because the mean of its divisors is an integer number (558580050).

Almost surely, 212021210123 is an apocalyptic number.

12021210123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12021210123 is a deficient number, since it is larger than the sum of its proper divisors (5853351477).

12021210123 is a wasteful number, since it uses less digits than its factorization.

12021210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021210123 its reverse (32101212021), we get a palindrome (44122422144).

The spelling of 12021210123 in words is "twelve billion, twenty-one million, two hundred ten thousand, one hundred twenty-three".

Divisors: 1 3 13 29 39 87 377 1097 1131 3291 9689 14261 29067 31813 42783 95439 125957 280981 377871 413569 842943 1240707 3652753 10628833 10958259 31886499 138174829 308236157 414524487 924708471 4007070041 12021210123