1213100333 has 8 divisors (see below), whose sum is σ = 1255503480. Its totient is φ = 1171307520.

The previous prime is 1213100321. The next prime is 1213100341. The reversal of 1213100333 is 3330013121.

It can be written as a sum of positive squares in 4 ways, for example, as 10259209 + 1202841124 = 3203^2 + 34682^2 .

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 1213100333 - 2⁶ = 1213100269 is a prime.

It is a super-2 number, since 2×1213100333² = 2943224835849421778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213100303) 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, 148538 + ... + 156491.

It is an arithmetic number, because the mean of its divisors is an integer number (156937935).

Almost surely, 2^1213100333 is an apocalyptic number.

It is an amenable number.

1213100333 is a deficient number, since it is larger than the sum of its proper divisors (42403147).

1213100333 is an equidigital number, since it uses as much as digits as its factorization.

1213100333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305167.

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

The square root of 1213100333 is about 34829.5899057109. The cubic root of 1213100333 is about 1066.5115767462.

Adding to 1213100333 its reverse (3330013121), we get a palindrome (4543113454).

The spelling of 1213100333 in words is "one billion, two hundred thirteen million, one hundred thousand, three hundred thirty-three".