1213308899 has 16 divisors (see below), whose sum is σ = 1336608000. Its totient is φ = 1092220320.

The previous prime is 1213308809. The next prime is 1213308917. The reversal of 1213308899 is 9988033121.

It is a cyclic number.

It is not a de Polignac number, because 1213308899 - 2¹² = 1213304803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213308809) 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, 777482 + ... + 779040.

It is an arithmetic number, because the mean of its divisors is an integer number (83538000).

Almost surely, 2^1213308899 is an apocalyptic number.

1213308899 is a deficient number, since it is larger than the sum of its proper divisors (123299101).

1213308899 is a wasteful number, since it uses less digits than its factorization.

1213308899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 1213308899 is about 34832.5838691304. The cubic root of 1213308899 is about 1066.5726943364.

The spelling of 1213308899 in words is "one billion, two hundred thirteen million, three hundred eight thousand, eight hundred ninety-nine".