121212001 has 8 divisors (see below), whose sum is σ = 133139520. Its totient is φ = 109839312.

The previous prime is 121211999. The next prime is 121212017. The reversal of 121212001 is 100212121.

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 121212001 - 2¹ = 121211999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138250 + ... + 139123.

It is an arithmetic number, because the mean of its divisors is an integer number (16642440).

Almost surely, 2^121212001 is an apocalyptic number.

It is an amenable number.

121212001 is a deficient number, since it is larger than the sum of its proper divisors (11927519).

121212001 is a wasteful number, since it uses less digits than its factorization.

121212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277415.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121212001 is about 11009.6321918582. The cubic root of 121212001 is about 494.8974395550.

Adding to 121212001 its reverse (100212121), we get a palindrome (221424122).

The spelling of 121212001 in words is "one hundred twenty-one million, two hundred twelve thousand, one".