1011211200 has 126 divisors (see below), whose sum is σ = 3594134544. Its totient is φ = 269652480.

The previous prime is 1011211193. The next prime is 1011211231. The reversal of 1011211200 is 21121101.

It is a happy number.

1011211200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20712 + ... + 49511.

Almost surely, 2^1011211200 is an apocalyptic number.

1011211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011211200 is an abundant number, since it is smaller than the sum of its proper divisors (2582923344).

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

1011211200 is a wasteful number, since it uses less digits than its factorization.

1011211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70251 (or 70233 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1011211200 is about 31799.5471665871. The cubic root of 1011211200 is about 1003.7231873389.

Adding to 1011211200 its reverse (21121101), we get a palindrome (1032332301).

Subtracting from 1011211200 its reverse (21121101), we obtain a palindrome (990090099).

It can be divided in two parts, 10112 and 11200, that added together give a palindrome (21312).

The spelling of 1011211200 in words is "one billion, eleven million, two hundred eleven thousand, two hundred".