1213120003 has 8 divisors (see below), whose sum is σ = 1221725520. Its totient is φ = 1204525920.

The previous prime is 1213119991. The next prime is 1213120039. The reversal of 1213120003 is 3000213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213120003 - 2²⁵ = 1179565571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213120043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428928 + ... + 431746.

It is an arithmetic number, because the mean of its divisors is an integer number (152715690).

Almost surely, 2^1213120003 is an apocalyptic number.

1213120003 is a deficient number, since it is larger than the sum of its proper divisors (8605517).

1213120003 is a wasteful number, since it uses less digits than its factorization.

1213120003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1213120003 is about 34829.8722794098. The cubic root of 1213120003 is about 1066.5173410865.

Adding to 1213120003 its reverse (3000213121), we get a palindrome (4213333124).

The spelling of 1213120003 in words is "one billion, two hundred thirteen million, one hundred twenty thousand, three".