12401434221 has 32 divisors (see below), whose sum is σ = 18484680192. Its totient is φ = 7330599360.

The previous prime is 12401434187. The next prime is 12401434289. The reversal of 12401434221 is 12243410421.

It is not a de Polignac number, because 12401434221 - 2⁷ = 12401434093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12401434191 and 12401434200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401434021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1034166 + ... + 1046088.

It is an arithmetic number, because the mean of its divisors is an integer number (577646256).

Almost surely, 2^12401434221 is an apocalyptic number.

12401434221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12401434221 is a deficient number, since it is larger than the sum of its proper divisors (6083245971).

12401434221 is a wasteful number, since it uses less digits than its factorization.

12401434221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12713.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12401434221 its reverse (12243410421), we get a palindrome (24644844642).

The spelling of 12401434221 in words is "twelve billion, four hundred one million, four hundred thirty-four thousand, two hundred twenty-one".