1100122221220 has 48 divisors (see below), whose sum is σ = 2545233316416. Its totient is φ = 396083600000.

The previous prime is 1100122221217. The next prime is 1100122221239. The reversal of 1100122221220 is 221222210011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1100122221194 and 1100122221203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24733006 + ... + 24777445.

It is an arithmetic number, because the mean of its divisors is an integer number (53025694092).

Almost surely, 2^{1100122221220} is an apocalyptic number.

1100122221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100122221220 is an abundant number, since it is smaller than the sum of its proper divisors (1445111095196).

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

1100122221220 is a wasteful number, since it uses less digits than its factorization.

1100122221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49510572 (or 49510570 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1100122221220 its reverse (221222210011), we get a palindrome (1321344431231).

The spelling of 1100122221220 in words is "one trillion, one hundred billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".