121212212011011 has 32 divisors (see below), whose sum is σ = 195899403248640. Its totient is φ = 73461617128800.

The previous prime is 121212212010961. The next prime is 121212212011013. The reversal of 121212212011011 is 110110212212121.

It is a happy number.

121212212011011 is a `hidden beast` number, since 121 + 21 + 221 + 201 + 101 + 1 = 666.

It is not a de Polignac number, because 121212212011011 - 2¹¹ = 121212212008963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212212011013) 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, 76369446 + ... + 77940468.

It is an arithmetic number, because the mean of its divisors is an integer number (6121856351520).

Almost surely, 2^{121212212011011} is an apocalyptic number.

121212212011011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121212212011011 is a deficient number, since it is larger than the sum of its proper divisors (74687191237629).

121212212011011 is a wasteful number, since it uses less digits than its factorization.

121212212011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830824 (or 1830818 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121212212011011 its reverse (110110212212121), we get a palindrome (231322424223132).

The spelling of 121212212011011 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, eleven thousand, eleven".