12121120011 has 64 divisors (see below), whose sum is σ = 21733770240. Its totient is φ = 5803107840.

The previous prime is 12121120009. The next prime is 12121120127. The reversal of 12121120011 is 11002112121.

It is not a de Polignac number, because 12121120011 - 2¹ = 12121120009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121020011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2126281 + ... + 2131973.

It is an arithmetic number, because the mean of its divisors is an integer number (339590160).

Almost surely, 2^12121120011 is an apocalyptic number.

12121120011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121120011 is a deficient number, since it is larger than the sum of its proper divisors (9612650229).

12121120011 is a wasteful number, since it uses less digits than its factorization.

12121120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121120011 its reverse (11002112121), we get a palindrome (23123232132).

The spelling of 12121120011 in words is "twelve billion, one hundred twenty-one million, one hundred twenty thousand, eleven".