12121002111 has 8 divisors (see below), whose sum is σ = 16170169984. Its totient is φ = 8076251160.

The previous prime is 12121002107. The next prime is 12121002119. The reversal of 12121002111 is 11120012121.

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

It is not a de Polignac number, because 12121002111 - 2² = 12121002107 is a prime.

It is a super-3 number, since 3×12121002111³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121002119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097821 + ... + 1108806.

It is an arithmetic number, because the mean of its divisors is an integer number (2021271248).

Almost surely, 2^12121002111 is an apocalyptic number.

12121002111 is a deficient number, since it is larger than the sum of its proper divisors (4049167873).

12121002111 is a wasteful number, since it uses less digits than its factorization.

12121002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208461.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121002111 its reverse (11120012121), we get a palindrome (23241014232).

The spelling of 12121002111 in words is "twelve billion, one hundred twenty-one million, two thousand, one hundred eleven".