1211110000 has 100 divisors (see below), whose sum is σ = 2949480864. Its totient is φ = 481600000.

The previous prime is 1211109997. The next prime is 1211110013. The reversal of 1211110000 is 111121.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2809785 + ... + 2810215.

Almost surely, 2^1211110000 is an apocalyptic number.

1211110000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474740432).

1211110000 is an abundant number, since it is smaller than the sum of its proper divisors (1738370864).

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

1211110000 is an equidigital number, since it uses as much as digits as its factorization.

1211110000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1211110000 is about 34801.0057325934. The cubic root of 1211110000 is about 1065.9279824908.

Adding to 1211110000 its reverse (111121), we get a palindrome (1211221121).

The spelling of 1211110000 in words is "one billion, two hundred eleven million, one hundred ten thousand".