12399221810 has 16 divisors (see below), whose sum is σ = 22793463936. Its totient is φ = 4854163248.

The previous prime is 12399221803. The next prime is 12399221831. The reversal of 12399221810 is 1812299321.

It is a super-2 number, since 2×12399221810² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13190192 + ... + 13191131.

It is an arithmetic number, because the mean of its divisors is an integer number (1424591496).

Almost surely, 2^12399221810 is an apocalyptic number.

12399221810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12399221810 is a deficient number, since it is larger than the sum of its proper divisors (10394242126).

12399221810 is a wasteful number, since it uses less digits than its factorization.

12399221810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26381377.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 12399221810 in words is "twelve billion, three hundred ninety-nine million, two hundred twenty-one thousand, eight hundred ten".