1211022330 has 128 divisors (see below), whose sum is σ = 3482873856. Its totient is φ = 263692800.

The previous prime is 1211022313. The next prime is 1211022341. The reversal of 1211022330 is 332201121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 368595 + ... + 371865.

It is an arithmetic number, because the mean of its divisors is an integer number (27209952).

Almost surely, 2^1211022330 is an apocalyptic number.

1211022330 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 1211022330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741436928).

1211022330 is an abundant number, since it is smaller than the sum of its proper divisors (2271851526).

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

1211022330 is a wasteful number, since it uses less digits than its factorization.

1211022330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1211022330 is about 34799.7461197636. The cubic root of 1211022330 is about 1065.9022616889.

Adding to 1211022330 its reverse (332201121), we get a palindrome (1543223451).

The spelling of 1211022330 in words is "one billion, two hundred eleven million, twenty-two thousand, three hundred thirty".