221234121204 has 24 divisors (see below), whose sum is σ = 543382052640. Its totient is φ = 69863406624.

The previous prime is 221234121191. The next prime is 221234121211. The reversal of 221234121204 is 402121432122.

It is a congruent number.

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, 485162319 + ... + 485162774.

It is an arithmetic number, because the mean of its divisors is an integer number (22640918860).

Almost surely, 2^221234121204 is an apocalyptic number.

It is an amenable number.

221234121204 is an abundant number, since it is smaller than the sum of its proper divisors (322147931436).

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

221234121204 is a wasteful number, since it uses less digits than its factorization.

221234121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970325119 (or 970325117 counting only the distinct ones).

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

Adding to 221234121204 its reverse (402121432122), we get a palindrome (623355553326).

The spelling of 221234121204 in words is "two hundred twenty-one billion, two hundred thirty-four million, one hundred twenty-one thousand, two hundred four".