12011342121 has 16 divisors (see below), whose sum is σ = 18060174400. Its totient is φ = 7888044384.

The previous prime is 12011342117. The next prime is 12011342131. The reversal of 12011342121 is 12124311021.

12011342121 is a `hidden beast` number, since 1 + 201 + 1 + 342 + 121 = 666.

It is not a de Polignac number, because 12011342121 - 2² = 12011342117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011342094 and 12011342103.

It is not an unprimeable number, because it can be changed into a prime (12011342111) 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, 3318076 + ... + 3321693.

It is an arithmetic number, because the mean of its divisors is an integer number (1128760900).

Almost surely, 2^12011342121 is an apocalyptic number.

It is an amenable number.

12011342121 is a deficient number, since it is larger than the sum of its proper divisors (6048832279).

12011342121 is an equidigital number, since it uses as much as digits as its factorization.

12011342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639845 (or 6639839 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12011342121 its reverse (12124311021), we get a palindrome (24135653142).

The spelling of 12011342121 in words is "twelve billion, eleven million, three hundred forty-two thousand, one hundred twenty-one".