121211002111 has 8 divisors (see below), whose sum is σ = 121992235344. Its totient is φ = 120432269760.

The previous prime is 121211002091. The next prime is 121211002117. The reversal of 121211002111 is 111200112121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121211002111 - 2²⁹ = 120674131199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211002091 and 121211002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211002117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527926 + ... + 721891.

It is an arithmetic number, because the mean of its divisors is an integer number (15249029418).

Almost surely, 2^121211002111 is an apocalyptic number.

121211002111 is a deficient number, since it is larger than the sum of its proper divisors (781233233).

121211002111 is a wasteful number, since it uses less digits than its factorization.

121211002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250441.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121211002111 its reverse (111200112121), we get a palindrome (232411114232).

The spelling of 121211002111 in words is "one hundred twenty-one billion, two hundred eleven million, two thousand, one hundred eleven".