211212212121112 has 8 divisors (see below), whose sum is σ = 396022897727100. Its totient is φ = 105606106060552.

The previous prime is 211212212121109. The next prime is 211212212121137. The reversal of 211212212121112 is 211121212212112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×211212212121112² (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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200763257562 + ... + 13200763257577.

Almost surely, 2^{211212212121112} is an apocalyptic number.

It is an amenable number.

211212212121112 is a deficient number, since it is larger than the sum of its proper divisors (184810685605988).

211212212121112 is a wasteful number, since it uses less digits than its factorization.

211212212121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26401526515145 (or 26401526515141 counting only the distinct ones).

The product of its digits is 128, while the sum is 22.

Adding to 211212212121112 its reverse (211121212212112), we get a palindrome (422333424333224).

The spelling of 211212212121112 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".