211220012100212 has 24 divisors (see below), whose sum is σ = 371657416710216. Its totient is φ = 105033717577728.

The previous prime is 211220012100187. The next prime is 211220012100233. The reversal of 211220012100212 is 212001210022112.

It can be written as a sum of positive squares in 4 ways, for example, as 15712614199396 + 195507397900816 = 3963914^2 + 13982396^2 .

It is a super-2 number, since 2×211220012100212² (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 7 ways as a sum of consecutive naturals, for example, 191803493 + ... + 192901580.

It is an arithmetic number, because the mean of its divisors is an integer number (15485725696259).

Almost surely, 2^{211220012100212} is an apocalyptic number.

It is an amenable number.

211220012100212 is a deficient number, since it is larger than the sum of its proper divisors (160437404610004).

211220012100212 is a wasteful number, since it uses less digits than its factorization.

211220012100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384705827 (or 384705825 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211220012100212 its reverse (212001210022112), we get a palindrome (423221222122324).

The spelling of 211220012100212 in words is "two hundred eleven trillion, two hundred twenty billion, twelve million, one hundred thousand, two hundred twelve".