12111333212121 has 32 divisors (see below), whose sum is σ = 18973691842560. Its totient is φ = 6774823540800.

The previous prime is 12111333212059. The next prime is 12111333212129. The reversal of 12111333212121 is 12121233311121.

It is not a de Polignac number, because 12111333212121 - 2⁹ = 12111333211609 is a prime.

It is a super-3 number, since 3×12111333212121³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111333212091 and 12111333212100.

It is not an unprimeable number, because it can be changed into a prime (12111333212129) 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, 2347320 + ... + 5452758.

It is an arithmetic number, because the mean of its divisors is an integer number (592927870080).

Almost surely, 2^{12111333212121} is an apocalyptic number.

12111333212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111333212121 is a deficient number, since it is larger than the sum of its proper divisors (6862358630439).

12111333212121 is a wasteful number, since it uses less digits than its factorization.

12111333212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114557.

The product of its digits is 432, while the sum is 24.

Adding to 12111333212121 its reverse (12121233311121), we get a palindrome (24232566523242).

The spelling of 12111333212121 in words is "twelve trillion, one hundred eleven billion, three hundred thirty-three million, two hundred twelve thousand, one hundred twenty-one".