1211100210212 has 12 divisors (see below), whose sum is σ = 2244097448460. Its totient is φ = 569929510656.

The previous prime is 1211100210179. The next prime is 1211100210269. The reversal of 1211100210212 is 2120120011121.

It can be written as a sum of positive squares in 2 ways, for example, as 488746402816 + 722353807396 = 699104^2 + 849914^2 .

It is a super-3 number, since 3×1211100210212³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8905148537 + ... + 8905148672.

It is an arithmetic number, because the mean of its divisors is an integer number (187008120705).

Almost surely, 2^{1211100210212} is an apocalyptic number.

It is an amenable number.

1211100210212 is a deficient number, since it is larger than the sum of its proper divisors (1032997238248).

1211100210212 is a wasteful number, since it uses less digits than its factorization.

1211100210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17810297230 (or 17810297228 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211100210212 its reverse (2120120011121), we get a palindrome (3331220221333).

The spelling of 1211100210212 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred ten thousand, two hundred twelve".