121212002111121 has 16 divisors (see below), whose sum is σ = 182961512622720. Its totient is φ = 79283322134640.

The previous prime is 121212002111027. The next prime is 121212002111143. The reversal of 121212002111121 is 121111200212121.

It is a happy number.

121212002111121 is a `hidden beast` number, since 1 + 212 + 120 + 0 + 211 + 1 + 121 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121212002111121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121212002111094 and 121212002111103.

It is not an unprimeable number, because it can be changed into a prime (121212002111171) 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, 42352200565 + ... + 42352203426.

It is an arithmetic number, because the mean of its divisors is an integer number (11435094538920).

Almost surely, 2^{121212002111121} is an apocalyptic number.

It is an amenable number.

121212002111121 is a deficient number, since it is larger than the sum of its proper divisors (61749510511599).

121212002111121 is an equidigital number, since it uses as much as digits as its factorization.

121212002111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84704404053 (or 84704404047 counting only the distinct ones).

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

Adding to 121212002111121 its reverse (121111200212121), we get a palindrome (242323202323242).

The spelling of 121212002111121 in words is "one hundred twenty-one trillion, two hundred twelve billion, two million, one hundred eleven thousand, one hundred twenty-one".