1213220103 has 8 divisors (see below), whose sum is σ = 1655246208. Its totient is φ = 790003704.

The previous prime is 1213220089. The next prime is 1213220131. The reversal of 1213220103 is 3010223121.

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

It is not a de Polignac number, because 1213220103 - 2⁶ = 1213220039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213220003) 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, 4702275 + ... + 4702532.

It is an arithmetic number, because the mean of its divisors is an integer number (206905776).

Almost surely, 2^1213220103 is an apocalyptic number.

1213220103 is a deficient number, since it is larger than the sum of its proper divisors (442026105).

1213220103 is an equidigital number, since it uses as much as digits as its factorization.

1213220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9404853.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1213220103 is about 34831.3092346527. The cubic root of 1213220103 is about 1066.5466746642.

Adding to 1213220103 its reverse (3010223121), we get a palindrome (4223443224).

The spelling of 1213220103 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, one hundred three".