1211173050 has 72 divisors (see below), whose sum is σ = 3170261376. Its totient is φ = 305966880.

The previous prime is 1211173049. The next prime is 1211173057. The reversal of 1211173050 is 503711121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1211173057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42967 + ... + 65333.

It is an arithmetic number, because the mean of its divisors is an integer number (44031408).

Almost surely, 2^1211173050 is an apocalyptic number.

1211173050 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 1211173050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585130688).

1211173050 is an abundant number, since it is smaller than the sum of its proper divisors (1959088326).

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

1211173050 is a wasteful number, since it uses less digits than its factorization.

1211173050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22420 (or 22396 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 1211173050 is about 34801.9115854288. The cubic root of 1211173050 is about 1065.9464794600.

Adding to 1211173050 its reverse (503711121), we get a palindrome (1714884171).

The spelling of 1211173050 in words is "one billion, two hundred eleven million, one hundred seventy-three thousand, fifty".