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12122231 = 111102021
BaseRepresentation
bin101110001111…
…100001110111
3211210212120112
4232033201313
511100402411
61111453235
7205015532
oct56174167
924725515
1012122231
11692a680
12408721b
132685824
141877a19
1510e6b8b
hexb8f877

12122231 has 4 divisors (see below), whose sum is σ = 13224264. Its totient is φ = 11020200.

The previous prime is 12122221. The next prime is 12122237. The reversal of 12122231 is 13222121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12122231 - 26 = 12122167 is a prime.

It is a super-2 number, since 2×121222312 = 293896968834722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551000 + ... + 551021.

It is an arithmetic number, because the mean of its divisors is an integer number (3306066).

Almost surely, 212122231 is an apocalyptic number.

12122231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12122231 is a deficient number, since it is larger than the sum of its proper divisors (1102033).

12122231 is a wasteful number, since it uses less digits than its factorization.

12122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102032.

The product of its digits is 48, while the sum is 14.

The square root of 12122231 is about 3481.6994413648. The cubic root of 12122231 is about 229.7175549947.

Adding to 12122231 its reverse (13222121), we get a palindrome (25344352).

It can be divided in two parts, 1212 and 2231, that added together give a palindrome (3443).

The spelling of 12122231 in words is "twelve million, one hundred twenty-two thousand, two hundred thirty-one".

Divisors: 1 11 1102021 12122231