1212214243 has 8 divisors (see below), whose sum is σ = 1217262368. Its totient is φ = 1207177344.

The previous prime is 1212214229. The next prime is 1212214249. The reversal of 1212214243 is 3424122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212214243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212214249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263146 + ... + 267712.

It is an arithmetic number, because the mean of its divisors is an integer number (152157796).

Almost surely, 2^1212214243 is an apocalyptic number.

1212214243 is a deficient number, since it is larger than the sum of its proper divisors (5048125).

1212214243 is an equidigital number, since it uses as much as digits as its factorization.

1212214243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613.

The product of its digits is 768, while the sum is 22.

The square root of 1212214243 is about 34816.8672197830. The cubic root of 1212214243 is about 1066.2518413109.

Adding to 1212214243 its reverse (3424122121), we get a palindrome (4636336364).

The spelling of 1212214243 in words is "one billion, two hundred twelve million, two hundred fourteen thousand, two hundred forty-three".