211212220212212 has 12 divisors (see below), whose sum is σ = 389075142496320. Its totient is φ = 100047893784696.

The previous prime is 211212220212197. The next prime is 211212220212233. The reversal of 211212220212212 is 212212022212112.

It is a super-2 number, since 2×211212220212212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389554080268 + ... + 1389554080419.

It is an arithmetic number, because the mean of its divisors is an integer number (32422928541360).

Almost surely, 2^{211212220212212} is an apocalyptic number.

It is an amenable number.

211212220212212 is a deficient number, since it is larger than the sum of its proper divisors (177862922284108).

211212220212212 is a wasteful number, since it uses less digits than its factorization.

211212220212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779108160710 (or 2779108160708 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211212220212212 its reverse (212212022212112), we get a palindrome (423424242424324).

The spelling of 211212220212212 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twenty million, two hundred twelve thousand, two hundred twelve".