1212212303 has 4 divisors (see below), whose sum is σ = 1215328920. Its totient is φ = 1209095688.

The previous prime is 1212212291. The next prime is 1212212321. The reversal of 1212212303 is 3032122121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212212303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557725 + ... + 1558502.

It is an arithmetic number, because the mean of its divisors is an integer number (303832230).

Almost surely, 2^1212212303 is an apocalyptic number.

1212212303 is a deficient number, since it is larger than the sum of its proper divisors (3116617).

1212212303 is an equidigital number, since it uses as much as digits as its factorization.

1212212303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116616.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212212303 is about 34816.8393597121. The cubic root of 1212212303 is about 1066.2512725089.

Adding to 1212212303 its reverse (3032122121), we get a palindrome (4244334424).

The spelling of 1212212303 in words is "one billion, two hundred twelve million, two hundred twelve thousand, three hundred three".