12122222121211 has 8 divisors (see below), whose sum is σ = 12837725493120. Its totient is φ = 11406988914048.

The previous prime is 12122222121209. The next prime is 12122222121281. The reversal of 12122222121211 is 11212122222121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12122222121211 - 2¹ = 12122222121209 is a prime.

It is a super-2 number, since 2×12122222121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122222121281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67448796 + ... + 67628281.

It is an arithmetic number, because the mean of its divisors is an integer number (1604715686640).

Almost surely, 2^{12122222121211} is an apocalyptic number.

12122222121211 is a deficient number, since it is larger than the sum of its proper divisors (715503371909).

12122222121211 is a wasteful number, since it uses less digits than its factorization.

12122222121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135082373.

The product of its digits is 256, while the sum is 22.

Adding to 12122222121211 its reverse (11212122222121), we get a palindrome (23334344343332).

The spelling of 12122222121211 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".