221234102121 has 8 divisors (see below), whose sum is σ = 312330497184. Its totient is φ = 138813554240.

The previous prime is 221234102107. The next prime is 221234102129. The reversal of 221234102121 is 121201432122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221234102121 - 2⁶ = 221234102057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221234102129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168961735 + ... + 2168961836.

It is an arithmetic number, because the mean of its divisors is an integer number (39041312148).

Almost surely, 2^221234102121 is an apocalyptic number.

It is an amenable number.

221234102121 is a deficient number, since it is larger than the sum of its proper divisors (91096395063).

221234102121 is a wasteful number, since it uses less digits than its factorization.

221234102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337923591.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221234102121 its reverse (121201432122), we get a palindrome (342435534243).

The spelling of 221234102121 in words is "two hundred twenty-one billion, two hundred thirty-four million, one hundred two thousand, one hundred twenty-one".