1121220210 has 256 divisors, whose sum is σ = 3341813760. Its totient is φ = 237219840.

The previous prime is 1121220179. The next prime is 1121220241. The reversal of 1121220210 is 120221211.

It is an interprime number because it is at equal distance from previous prime (1121220179) and next prime (1121220241).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7141452 + ... + 7141608.

It is an arithmetic number, because the mean of its divisors is an integer number (13053960).

Almost surely, 2^1121220210 is an apocalyptic number.

1121220210 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 1121220210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670906880).

1121220210 is an abundant number, since it is smaller than the sum of its proper divisors (2220593550).

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

1121220210 is a wasteful number, since it uses less digits than its factorization.

1121220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1121220210 is about 33484.6264724575. The cubic root of 1121220210 is about 1038.8758223748.

Adding to 1121220210 its reverse (120221211), we get a palindrome (1241441421).

The spelling of 1121220210 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".