1211100112 has 10 divisors (see below), whose sum is σ = 2346506498. Its totient is φ = 605550048.

The previous prime is 1211100101. The next prime is 1211100113. The reversal of 1211100112 is 2110011121.

It can be written as a sum of positive squares in only one way, i.e., 1188594576 + 22505536 = 34476^2 + 4744^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37846863 + ... + 37846894.

Almost surely, 2^1211100112 is an apocalyptic number.

It is an amenable number.

1211100112 is a deficient number, since it is larger than the sum of its proper divisors (1135406386).

1211100112 is an equidigital number, since it uses as much as digits as its factorization.

1211100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75693765 (or 75693759 counting only the distinct ones).

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

The square root of 1211100112 is about 34800.8636674437. The cubic root of 1211100112 is about 1065.9250815914.

Adding to 1211100112 its reverse (2110011121), we get a palindrome (3321111233).

The spelling of 1211100112 in words is "one billion, two hundred eleven million, one hundred thousand, one hundred twelve".