222121111011 has 8 divisors (see below), whose sum is σ = 297934904064. Its totient is φ = 147194029320.

The previous prime is 222121110979. The next prime is 222121111031. The reversal of 222121111011 is 110111121222.

It is a happy number.

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

It is not a de Polignac number, because 222121111011 - 2⁵ = 222121110979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222121111031) 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, 221677255 + ... + 221678256.

It is an arithmetic number, because the mean of its divisors is an integer number (37241863008).

Almost surely, 2^222121111011 is an apocalyptic number.

222121111011 is a deficient number, since it is larger than the sum of its proper divisors (75813793053).

222121111011 is a wasteful number, since it uses less digits than its factorization.

222121111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443355681.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 222121111011 its reverse (110111121222), we get a palindrome (332232232233).

The spelling of 222121111011 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, eleven".