1121100122220 has 384 divisors, whose sum is σ = 3495796641792. Its totient is φ = 266698137600.

The previous prime is 1121100122209. The next prime is 1121100122231. The reversal of 1121100122220 is 222210011211.

It is an interprime number because it is at equal distance from previous prime (1121100122209) and next prime (1121100122231).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1121100122220.

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, 2400642427 + ... + 2400642893.

It is an arithmetic number, because the mean of its divisors is an integer number (9103637088).

Almost surely, 2^{1121100122220} is an apocalyptic number.

1121100122220 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 1121100122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747898320896).

1121100122220 is an abundant number, since it is smaller than the sum of its proper divisors (2374696519572).

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

1121100122220 is a wasteful number, since it uses less digits than its factorization.

1121100122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1121100122220 its reverse (222210011211), we get a palindrome (1343310133431).

The spelling of 1121100122220 in words is "one trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, two hundred twenty".