1211201112 has 32 divisors (see below), whose sum is σ = 3303276480. Its totient is φ = 367030560.

The previous prime is 1211201107. The next prime is 1211201207. The reversal of 1211201112 is 2111021121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2293678 + ... + 2294205.

It is an arithmetic number, because the mean of its divisors is an integer number (103227390).

Almost surely, 2^1211201112 is an apocalyptic number.

1211201112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211201112 is an abundant number, since it is smaller than the sum of its proper divisors (2092075368).

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

1211201112 is a wasteful number, since it uses less digits than its factorization.

1211201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587903 (or 4587899 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1211201112 is about 34802.3147506024. The cubic root of 1211201112 is about 1065.9547117983.

Adding to 1211201112 its reverse (2111021121), we get a palindrome (3322222233).

Subtracting 1211201112 from its reverse (2111021121), we obtain a square (899820009 = 29997²).

The spelling of 1211201112 in words is "one billion, two hundred eleven million, two hundred one thousand, one hundred twelve".