1121212000 has 48 divisors (see below), whose sum is σ = 2754827712. Its totient is φ = 448483200.

The previous prime is 1121211991. The next prime is 1121212013. The reversal of 1121212000 is 2121211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136152 + ... + 144151.

It is an arithmetic number, because the mean of its divisors is an integer number (57392244).

Almost surely, 2^1121212000 is an apocalyptic number.

1121212000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121212000 is an abundant number, since it is smaller than the sum of its proper divisors (1633615712).

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

1121212000 is an equidigital number, since it uses as much as digits as its factorization.

1121212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280328 (or 280310 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1121212000 is about 33484.5038786601. The cubic root of 1121212000 is about 1038.8732866875.

Adding to 1121212000 its reverse (2121211), we get a palindrome (1123333211).

The spelling of 1121212000 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand".