222012121111 has 4 divisors (see below), whose sum is σ = 242195041224. Its totient is φ = 201829201000.

The previous prime is 222012121087. The next prime is 222012121117. The reversal of 222012121111 is 111121210222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222012121111 - 2⁹ = 222012120599 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 (222012121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10091460040 + ... + 10091460061.

It is an arithmetic number, because the mean of its divisors is an integer number (60548760306).

Almost surely, 2^222012121111 is an apocalyptic number.

222012121111 is a deficient number, since it is larger than the sum of its proper divisors (20182920113).

222012121111 is a wasteful number, since it uses less digits than its factorization.

222012121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20182920112.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 222012121111 its reverse (111121210222), we get a palindrome (333133331333).

The spelling of 222012121111 in words is "two hundred twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred eleven".