1212242201 has 4 divisors (see below), whose sum is σ = 1212530304. Its totient is φ = 1211954100.

The previous prime is 1212242179. The next prime is 1212242219. The reversal of 1212242201 is 1022422121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212242201 is a prime.

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 1212242201.

It is not an unprimeable number, because it can be changed into a prime (1212242221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137645 + ... + 146186.

It is an arithmetic number, because the mean of its divisors is an integer number (303132576).

Almost surely, 2^1212242201 is an apocalyptic number.

It is an amenable number.

1212242201 is a deficient number, since it is larger than the sum of its proper divisors (288103).

1212242201 is an equidigital number, since it uses as much as digits as its factorization.

1212242201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288102.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1212242201 is about 34817.2687182668. The cubic root of 1212242201 is about 1066.2600384427.

Adding to 1212242201 its reverse (1022422121), we get a palindrome (2234664322).

The spelling of 1212242201 in words is "one billion, two hundred twelve million, two hundred forty-two thousand, two hundred one".