1213103320 has 64 divisors (see below), whose sum is σ = 3206679840. Its totient is φ = 407193600.

The previous prime is 1213103303. The next prime is 1213103327. The reversal of 1213103320 is 233013121.

It is a junction number, because it is equal to n+sod(n) for n = 1213103294 and 1213103303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213103327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100321 + ... + 111760.

Almost surely, 2^1213103320 is an apocalyptic number.

1213103320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213103320 is an abundant number, since it is smaller than the sum of its proper divisors (1993576520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213103320 is a wasteful number, since it uses less digits than its factorization.

1213103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212116 (or 212112 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213103320 is about 34829.6327858908. The cubic root of 1213103320 is about 1066.5124520977.

Adding to 1213103320 its reverse (233013121), we get a palindrome (1446116441).

The spelling of 1213103320 in words is "one billion, two hundred thirteen million, one hundred three thousand, three hundred twenty".