12122011 has 4 divisors (see below), whose sum is σ = 13224024. Its totient is φ = 11020000.

The previous prime is 12122009. The next prime is 12122021. The reversal of 12122011 is 11022121.

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 12122011 - 2¹ = 12122009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122021) 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, 550990 + ... + 551011.

It is an arithmetic number, because the mean of its divisors is an integer number (3306006).

Almost surely, 2^12122011 is an apocalyptic number.

12122011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12122011 is a deficient number, since it is larger than the sum of its proper divisors (1102013).

12122011 is a wasteful number, since it uses less digits than its factorization.

12122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102012.

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

The square root of 12122011 is about 3481.6678474547. The cubic root of 12122011 is about 229.7161653119.

Adding to 12122011 its reverse (11022121), we get a palindrome (23144132).

It can be divided in two parts, 1212 and 2011, that added together give a palindrome (3223).

The spelling of 12122011 in words is "twelve million, one hundred twenty-two thousand, eleven".