1211152170 has 64 divisors (see below), whose sum is σ = 3042883584. Its totient is φ = 307940160.

The previous prime is 1211152157. The next prime is 1211152171. The reversal of 1211152170 is 712511121.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211152171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225739 + ... + 231041.

It is an arithmetic number, because the mean of its divisors is an integer number (47545056).

Almost surely, 2^1211152170 is an apocalyptic number.

1211152170 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 1211152170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521441792).

1211152170 is an abundant number, since it is smaller than the sum of its proper divisors (1831731414).

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

1211152170 is a wasteful number, since it uses less digits than its factorization.

1211152170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667.

The product of its (nonzero) digits is 140, while the sum is 21.

The square root of 1211152170 is about 34801.6116006141. The cubic root of 1211152170 is about 1065.9403539685.

Adding to 1211152170 its reverse (712511121), we get a palindrome (1923663291).

The spelling of 1211152170 in words is "one billion, two hundred eleven million, one hundred fifty-two thousand, one hundred seventy".