221321213121214 has 16 divisors (see below), whose sum is σ = 335296259930016. Its totient is φ = 109555972828000.

The previous prime is 221321213121179. The next prime is 221321213121269. The reversal of 221321213121214 is 412121312123122.

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, 42450922 + ... + 47378509.

It is an arithmetic number, because the mean of its divisors is an integer number (20956016245626).

Almost surely, 2^{221321213121214} is an apocalyptic number.

221321213121214 is a deficient number, since it is larger than the sum of its proper divisors (113975046808802).

221321213121214 is a wasteful number, since it uses less digits than its factorization.

221321213121214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89841731.

The product of its digits is 2304, while the sum is 28.

Adding to 221321213121214 its reverse (412121312123122), we get a palindrome (633442525244336).

The spelling of 221321213121214 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred fourteen".