121212001121 has 24 divisors (see below), whose sum is σ = 131958139104. Its totient is φ = 111257879040.

The previous prime is 121212001091. The next prime is 121212001139. The reversal of 121212001121 is 121100212121.

It is not a de Polignac number, because 121212001121 - 2¹⁰ = 121212000097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212001096 and 121212001105.

It is not an unprimeable number, because it can be changed into a prime (121212001181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8480501 + ... + 8494781.

It is an arithmetic number, because the mean of its divisors is an integer number (5498255796).

Almost surely, 2^121212001121 is an apocalyptic number.

It is an amenable number.

121212001121 is a deficient number, since it is larger than the sum of its proper divisors (10746137983).

121212001121 is a wasteful number, since it uses less digits than its factorization.

121212001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15041 (or 15024 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212001121 its reverse (121100212121), we get a palindrome (242312213242).

The spelling of 121212001121 in words is "one hundred twenty-one billion, two hundred twelve million, one thousand, one hundred twenty-one".