1212214121 has 8 divisors (see below), whose sum is σ = 1284433920. Its totient is φ = 1140095808.

The previous prime is 1212214109. The next prime is 1212214147. The reversal of 1212214121 is 1214122121.

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 1212214121 - 2¹⁰ = 1212213097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212214121.

It is not an unprimeable number, because it can be changed into a prime (1212214151) 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, 41 + ... + 49238.

It is an arithmetic number, because the mean of its divisors is an integer number (160554240).

Almost surely, 2^1212214121 is an apocalyptic number.

It is an amenable number.

1212214121 is a deficient number, since it is larger than the sum of its proper divisors (72219799).

1212214121 is a wasteful number, since it uses less digits than its factorization.

1212214121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50743.

The product of its digits is 64, while the sum is 17.

The square root of 1212214121 is about 34816.8654677586. The cubic root of 1212214121 is about 1066.2518055409.

Adding to 1212214121 its reverse (1214122121), we get a palindrome (2426336242).

The spelling of 1212214121 in words is "one billion, two hundred twelve million, two hundred fourteen thousand, one hundred twenty-one".