221234121234 has 64 divisors (see below), whose sum is σ = 573331104000. Its totient is φ = 63209743632.

The previous prime is 221234121211. The next prime is 221234121313. The reversal of 221234121234 is 432121432122.

221234121234 is a `hidden beast` number, since 2 + 2 + 12 + 3 + 412 + 1 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 221234121198 and 221234121207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5953677 + ... + 5990720.

It is an arithmetic number, because the mean of its divisors is an integer number (8958298500).

Almost surely, 2^221234121234 is an apocalyptic number.

221234121234 is an abundant number, since it is smaller than the sum of its proper divisors (352096982766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221234121234 is a wasteful number, since it uses less digits than its factorization.

221234121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11944429 (or 11944409 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 221234121234 its reverse (432121432122), we get a palindrome (653355553356).

The spelling of 221234121234 in words is "two hundred twenty-one billion, two hundred thirty-four million, one hundred twenty-one thousand, two hundred thirty-four".