1121210000 has 50 divisors (see below), whose sum is σ = 2714585742. Its totient is φ = 448480000.

The previous prime is 1121209987. The next prime is 1121210009. The reversal of 1121210000 is 121211.

It can be written as a sum of positive squares in 5 ways, for example, as 758231296 + 362978704 = 27536^2 + 19052^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a super-2 number, since 2×1121210000² = 2514223728200000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1121210000.

It is not an unprimeable number, because it can be changed into a prime (1121210009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 46061 + ... + 66060.

Almost surely, 2^1121210000 is an apocalyptic number.

1121210000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121210000 is an abundant number, since it is smaller than the sum of its proper divisors (1593375742).

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

1121210000 is an equidigital number, since it uses as much as digits as its factorization.

1121210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112149 (or 112128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1121210000 is about 33484.4740140860. The cubic root of 1121210000 is about 1038.8726689787.

Adding to 1121210000 its reverse (121211), we get a palindrome (1121331211).

It can be divided in two parts, 11212 and 10000, that added together give a palindrome (21212).

The spelling of 1121210000 in words is "one billion, one hundred twenty-one million, two hundred ten thousand".