1211110012 has 12 divisors (see below), whose sum is σ = 2422220080. Its totient is φ = 519047136.

The previous prime is 1211109997. The next prime is 1211110013. The reversal of 1211110012 is 2100111121.

1211110012 is an admirable number.

It is a super-2 number, since 2×1211110012² = 2933574922333280288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211110013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21626937 + ... + 21626992.

Almost surely, 2^1211110012 is an apocalyptic number.

It is an amenable number.

1211110012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211110012 is a wasteful number, since it uses less digits than its factorization.

1211110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43253940 (or 43253938 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1211110012 is about 34801.0059050022. The cubic root of 1211110012 is about 1065.9279860113.

Adding to 1211110012 its reverse (2100111121), we get a palindrome (3311221133).

The spelling of 1211110012 in words is "one billion, two hundred eleven million, one hundred ten thousand, twelve".