1213031303 has 4 divisors (see below), whose sum is σ = 1323306888. Its totient is φ = 1102755720.

The previous prime is 1213031297. The next prime is 1213031317. The reversal of 1213031303 is 3031303121.

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

It is not a de Polignac number, because 1213031303 - 2²² = 1208836999 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 (1213031503) 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, 55137776 + ... + 55137797.

It is an arithmetic number, because the mean of its divisors is an integer number (330826722).

Almost surely, 2^1213031303 is an apocalyptic number.

1213031303 is a deficient number, since it is larger than the sum of its proper divisors (110275585).

1213031303 is a wasteful number, since it uses less digits than its factorization.

1213031303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110275584.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1213031303 is about 34828.5989238729. The cubic root of 1213031303 is about 1066.4913468475.

Adding to 1213031303 its reverse (3031303121), we get a palindrome (4244334424).

It can be divided in two parts, 121 and 3031303, that multiplied together give a palindrome (366787663).

The spelling of 1213031303 in words is "one billion, two hundred thirteen million, thirty-one thousand, three hundred three".