121121212120011 has 6 divisors (see below), whose sum is σ = 174952861951140. Its totient is φ = 80747474746668.

The previous prime is 121121212119989. The next prime is 121121212120031. The reversal of 121121212120011 is 110021212121121.

It is a happy number.

121121212120011 is a `hidden beast` number, since 121 + 1 + 212 + 121 + 200 + 11 = 666.

It is not a de Polignac number, because 121121212120011 - 2⁹ = 121121212119499 is a prime.

It is a super-2 number, since 2×121121212120011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121121212120031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6728956228881 + ... + 6728956228898.

It is an arithmetic number, because the mean of its divisors is an integer number (29158810325190).

Almost surely, 2^{121121212120011} is an apocalyptic number.

121121212120011 is a deficient number, since it is larger than the sum of its proper divisors (53831649831129).

121121212120011 is a wasteful number, since it uses less digits than its factorization.

121121212120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13457912457785 (or 13457912457782 counting only the distinct ones).

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

Adding to 121121212120011 its reverse (110021212121121), we get a palindrome (231142424241132).

The spelling of 121121212120011 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, eleven".