111212122211222 has 8 divisors (see below), whose sum is σ = 166818251526696. Its totient is φ = 55606038368992.

The previous prime is 111212122211173. The next prime is 111212122211251. The reversal of 111212122211222 is 222112221212111.

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

It is a super-2 number, since 2×111212122211222² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4399868 + ... + 15549375.

It is an arithmetic number, because the mean of its divisors is an integer number (20852281440837).

Almost surely, 2^{111212122211222} is an apocalyptic number.

111212122211222 is a deficient number, since it is larger than the sum of its proper divisors (55606129315474).

111212122211222 is a wasteful number, since it uses less digits than its factorization.

111212122211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22736622.

The product of its digits is 256, while the sum is 23.

Adding to 111212122211222 its reverse (222112221212111), we get a palindrome (333324343423333).

The spelling of 111212122211222 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".