222116378221 has 8 divisors (see below), whose sum is σ = 223613711360. Its totient is φ = 220620687552.

The previous prime is 222116378179. The next prime is 222116378299. The reversal of 222116378221 is 122873611222.

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 222116378221 - 2¹³ = 222116370029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222116378621) 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, 138636 + ... + 680773.

It is an arithmetic number, because the mean of its divisors is an integer number (27951713920).

Almost surely, 2^222116378221 is an apocalyptic number.

It is an amenable number.

222116378221 is a deficient number, since it is larger than the sum of its proper divisors (1497333139).

222116378221 is a wasteful number, since it uses less digits than its factorization.

222116378221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821235.

The product of its digits is 32256, while the sum is 37.

Adding to 222116378221 its reverse (122873611222), we get a palindrome (344989989443).

The spelling of 222116378221 in words is "two hundred twenty-two billion, one hundred sixteen million, three hundred seventy-eight thousand, two hundred twenty-one".