1211101230 has 64 divisors (see below), whose sum is σ = 3086864640. Its totient is φ = 303238656.

The previous prime is 1211101187. The next prime is 1211101237. The reversal of 1211101230 is 321011121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55009 + ... + 73811.

It is an arithmetic number, because the mean of its divisors is an integer number (48232260).

Almost surely, 2^1211101230 is an apocalyptic number.

1211101230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211101230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543432320).

1211101230 is an abundant number, since it is smaller than the sum of its proper divisors (1875763410).

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

1211101230 is a wasteful number, since it uses less digits than its factorization.

1211101230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18945.

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

The square root of 1211101230 is about 34800.8797302597. The cubic root of 1211101230 is about 1065.9254095863.

Adding to 1211101230 its reverse (321011121), we get a palindrome (1532112351).

The spelling of 1211101230 in words is "one billion, two hundred eleven million, one hundred one thousand, two hundred thirty".