1216988203 has 2 divisors, whose sum is σ = 1216988204. Its totient is φ = 1216988202.

The previous prime is 1216988177. The next prime is 1216988207. The reversal of 1216988203 is 3028896121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3028896121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216988203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216988207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608494101 + 608494102.

It is an arithmetic number, because the mean of its divisors is an integer number (608494102).

Almost surely, 2^1216988203 is an apocalyptic number.

1216988203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216988203 is an equidigital number, since it uses as much as digits as its factorization.

1216988203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1216988203 is about 34885.3580030362. The cubic root of 1216988203 is about 1067.6497174409.

The spelling of 1216988203 in words is "one billion, two hundred sixteen million, nine hundred eighty-eight thousand, two hundred three".