1212002147 has 4 divisors (see below), whose sum is σ = 1220849016. Its totient is φ = 1203155280.

The previous prime is 1212002117. The next prime is 1212002149. The reversal of 1212002147 is 7412002121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7412002121 = 97 ⋅76412393.

It is a cyclic number.

It is not a de Polignac number, because 1212002147 - 2⁸ = 1212001891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212002149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4423229 + ... + 4423502.

It is an arithmetic number, because the mean of its divisors is an integer number (305212254).

Almost surely, 2^1212002147 is an apocalyptic number.

1212002147 is a deficient number, since it is larger than the sum of its proper divisors (8846869).

1212002147 is an equidigital number, since it uses as much as digits as its factorization.

1212002147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8846868.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1212002147 is about 34813.8212065266. The cubic root of 1212002147 is about 1066.1896518251.

Adding to 1212002147 its reverse (7412002121), we get a palindrome (8624004268).

The spelling of 1212002147 in words is "one billion, two hundred twelve million, two thousand, one hundred forty-seven".