1212228787 has 24 divisors (see below), whose sum is σ = 1552789440. Its totient is φ = 935721360.

The previous prime is 1212228761. The next prime is 1212228791. The reversal of 1212228787 is 7878222121.

It is not a de Polignac number, because 1212228787 - 2⁷ = 1212228659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212228287) 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 23 ways as a sum of consecutive naturals, for example, 47164 + ... + 68182.

It is an arithmetic number, because the mean of its divisors is an integer number (64699560).

Almost surely, 2^1212228787 is an apocalyptic number.

1212228787 is a deficient number, since it is larger than the sum of its proper divisors (340560653).

1212228787 is a wasteful number, since it uses less digits than its factorization.

1212228787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21151 (or 21144 counting only the distinct ones).

The product of its digits is 50176, while the sum is 40.

The square root of 1212228787 is about 34817.0760834393. The cubic root of 1212228787 is about 1066.2561055474.

The spelling of 1212228787 in words is "one billion, two hundred twelve million, two hundred twenty-eight thousand, seven hundred eighty-seven".