1211001212 has 12 divisors (see below), whose sum is σ = 2120435016. Its totient is φ = 605162640.

The previous prime is 1211001193. The next prime is 1211001223. The reversal of 1211001212 is 2121001121.

It is a junction number, because it is equal to n+sod(n) for n = 1211001193 and 1211001202.

It is a congruent number.

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, 76343 + ... + 90830.

It is an arithmetic number, because the mean of its divisors is an integer number (176702918).

Almost surely, 2^1211001212 is an apocalyptic number.

It is an amenable number.

1211001212 is a deficient number, since it is larger than the sum of its proper divisors (909433804).

1211001212 is a wasteful number, since it uses less digits than its factorization.

1211001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168988 (or 168986 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211001212 is about 34799.4426966870. The cubic root of 1211001212 is about 1065.8960658618.

Adding to 1211001212 its reverse (2121001121), we get a palindrome (3332002333).

Subtracting 1211001212 from its reverse (2121001121), we obtain a palindrome (909999909).

The spelling of 1211001212 in words is "one billion, two hundred eleven million, one thousand, two hundred twelve".