1121221210 has 16 divisors (see below), whose sum is σ = 2025489096. Its totient is φ = 446868288.

The previous prime is 1121221183. The next prime is 1121221223. The reversal of 1121221210 is 121221211.

It can be written as a sum of positive squares in 4 ways, for example, as 693848281 + 427372929 = 26341^2 + 20673^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199617 + ... + 205156.

Almost surely, 2^1121221210 is an apocalyptic number.

1121221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121221210 is a deficient number, since it is larger than the sum of its proper divisors (904267886).

1121221210 is a wasteful number, since it uses less digits than its factorization.

1121221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405057.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1121221210 is about 33484.6414046798. The cubic root of 1121221210 is about 1038.8761312274.

Adding to 1121221210 its reverse (121221211), we get a palindrome (1242442421).

Subtracting from 1121221210 its reverse (121221211), we obtain a palindrome (999999999).

The spelling of 1121221210 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".