12120002121 has 16 divisors (see below), whose sum is σ = 16417795968. Its totient is φ = 7952064000.

The previous prime is 12120002107. The next prime is 12120002123.

12120002121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12120002121 - 2¹³ = 12119993929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120002097 and 12120002106.

It is not an unprimeable number, because it can be changed into a prime (12120002123) 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, 69160 + ... + 170361.

It is an arithmetic number, because the mean of its divisors is an integer number (1026112248).

Almost surely, 2^12120002121 is an apocalyptic number.

It is an amenable number.

12120002121 is a deficient number, since it is larger than the sum of its proper divisors (4297793847).

12120002121 is a wasteful number, since it uses less digits than its factorization.

12120002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239792.

The product of its (nonzero) digits is 16, while the sum is 12.

It can be divided in two parts, 1212000 and 2121, that added together give a palindrome (1214121).

The spelling of 12120002121 in words is "twelve billion, one hundred twenty million, two thousand, one hundred twenty-one".