121212102011 has 16 divisors (see below), whose sum is σ = 162746320128. Its totient is φ = 87185527200.

The previous prime is 121212101939. The next prime is 121212102019. The reversal of 121212102011 is 110201212121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212102011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212102019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60544505 + ... + 60546506.

It is an arithmetic number, because the mean of its divisors is an integer number (10171645008).

Almost surely, 2^121212102011 is an apocalyptic number.

121212102011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121212102011 is a deficient number, since it is larger than the sum of its proper divisors (41534218117).

121212102011 is a wasteful number, since it uses less digits than its factorization.

121212102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121091042.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212102011 its reverse (110201212121), we get a palindrome (231413314132).

The spelling of 121212102011 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred two thousand, eleven".