221210343412 has 12 divisors (see below), whose sum is σ = 387189418336. Its totient is φ = 110584795320.

The previous prime is 221210343401. The next prime is 221210343451. The reversal of 221210343412 is 214343012122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5069658 + ... + 5113105.

Almost surely, 2^221210343412 is an apocalyptic number.

It is an amenable number.

221210343412 is a deficient number, since it is larger than the sum of its proper divisors (165979074924).

221210343412 is a wasteful number, since it uses less digits than its factorization.

221210343412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10188198 (or 10188196 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221210343412 its reverse (214343012122), we get a palindrome (435553355534).

The spelling of 221210343412 in words is "two hundred twenty-one billion, two hundred ten million, three hundred forty-three thousand, four hundred twelve".