221321204114 has 4 divisors (see below), whose sum is σ = 331981806174. Its totient is φ = 110660602056.

The previous prime is 221321204107. The next prime is 221321204123. The reversal of 221321204114 is 411402123122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 411402123122 = 2 ⋅205701061561.

It can be written as a sum of positive squares in only one way, i.e., 197328743089 + 23992461025 = 444217^2 + 154895^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221321204114.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55330301027 + ... + 55330301030.

Almost surely, 2^221321204114 is an apocalyptic number.

221321204114 is a deficient number, since it is larger than the sum of its proper divisors (110660602060).

221321204114 is a wasteful number, since it uses less digits than its factorization.

221321204114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110660602059.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 221321204114 its reverse (411402123122), we get a palindrome (632723327236).

The spelling of 221321204114 in words is "two hundred twenty-one billion, three hundred twenty-one million, two hundred four thousand, one hundred fourteen".