1213333020 has 84 divisors (see below), whose sum is σ = 3820297320. Its totient is φ = 323551584.

The previous prime is 1213333019. The next prime is 1213333097. The reversal of 1213333020 is 203333121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1213332984 and 1213333002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 27030 + ... + 56189.

It is an arithmetic number, because the mean of its divisors is an integer number (45479730).

Almost surely, 2^1213333020 is an apocalyptic number.

1213333020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213333020 is an abundant number, since it is smaller than the sum of its proper divisors (2606964300).

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

1213333020 is an equidigital number, since it uses as much as digits as its factorization.

1213333020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83246 (or 83229 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1213333020 is about 34832.9301093089. The cubic root of 1213333020 is about 1066.5797622341.

Adding to 1213333020 its reverse (203333121), we get a palindrome (1416666141).

The spelling of 1213333020 in words is "one billion, two hundred thirteen million, three hundred thirty-three thousand, twenty".