1211100110212 has 12 divisors (see below), whose sum is σ = 2119911664780. Its totient is φ = 605411063136.

The previous prime is 1211100110183. The next prime is 1211100110257. The reversal of 1211100110212 is 2120110011121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 862546842756 + 348553267456 = 928734^2 + 590384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211100110192 and 1211100110201.

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, 34728387 + ... + 34763242.

Almost surely, 2^{1211100110212} is an apocalyptic number.

It is an amenable number.

1211100110212 is a deficient number, since it is larger than the sum of its proper divisors (908811554568).

1211100110212 is a wasteful number, since it uses less digits than its factorization.

1211100110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69495990 (or 69495988 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211100110212 its reverse (2120110011121), we get a palindrome (3331210121333).

Subtracting 1211100110212 from its reverse (2120110011121), we obtain a palindrome (909009900909).

The spelling of 1211100110212 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred ten thousand, two hundred twelve".