1213323633 has 24 divisors (see below), whose sum is σ = 1787676800. Its totient is φ = 792833184.

The previous prime is 1213323533. The next prime is 1213323673. The reversal of 1213323633 is 3363233121.

It is a happy number.

1213323633 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 3 + 23 + 633 = 666.

It is not a de Polignac number, because 1213323633 - 2²¹ = 1211226481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213323597 and 1213323606.

It is not an unprimeable number, because it can be changed into a prime (1213323673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92691 + ... + 104967.

Almost surely, 2^1213323633 is an apocalyptic number.

It is an amenable number.

1213323633 is a deficient number, since it is larger than the sum of its proper divisors (574353167).

1213323633 is a wasteful number, since it uses less digits than its factorization.

1213323633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12501 (or 12498 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

The square root of 1213323633 is about 34832.7953658618. The cubic root of 1213323633 is about 1066.5770116812.

Adding to 1213323633 its reverse (3363233121), we get a palindrome (4576556754).

The spelling of 1213323633 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, six hundred thirty-three".