1213011326 has 16 divisors (see below), whose sum is σ = 1852156800. Its totient is φ = 595645848.

The previous prime is 1213011323. The next prime is 1213011343. The reversal of 1213011326 is 6231103121.

It is a junction number, because it is equal to n+sod(n) for n = 1213011298 and 1213011307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213011323) 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, 132815 + ... + 141653.

It is an arithmetic number, because the mean of its divisors is an integer number (115759800).

Almost surely, 2^1213011326 is an apocalyptic number.

1213011326 is a deficient number, since it is larger than the sum of its proper divisors (639145474).

1213011326 is a wasteful number, since it uses less digits than its factorization.

1213011326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1213011326 is about 34828.3121325166. The cubic root of 1213011326 is about 1066.4854922543.

Adding to 1213011326 its reverse (6231103121), we get a palindrome (7444114447).

The spelling of 1213011326 in words is "one billion, two hundred thirteen million, eleven thousand, three hundred twenty-six".