1121102220 has 192 divisors, whose sum is σ = 3879429120. Its totient is φ = 236141568.

The previous prime is 1121102189. The next prime is 1121102251. The reversal of 1121102220 is 222011211.

It is an interprime number because it is at equal distance from previous prime (1121102189) and next prime (1121102251).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1121102196 and 1121102205.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 293362 + ... + 297158.

It is an arithmetic number, because the mean of its divisors is an integer number (20205360).

Almost surely, 2^1121102220 is an apocalyptic number.

1121102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1939714560).

1121102220 is an abundant number, since it is smaller than the sum of its proper divisors (2758326900).

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

1121102220 is a wasteful number, since it uses less digits than its factorization.

1121102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3870 counting only the distinct ones).

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

The square root of 1121102220 is about 33482.8645727931. The cubic root of 1121102220 is about 1038.8393795609.

Adding to 1121102220 its reverse (222011211), we get a palindrome (1343113431).

The spelling of 1121102220 in words is "one billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".