1100021121100 has 72 divisors (see below), whose sum is σ = 2604216163248. Its totient is φ = 399982156800.

The previous prime is 1100021120981. The next prime is 1100021121103. The reversal of 1100021121100 is 11211200011.

It is a super-2 number, since 2×1100021121100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1100021121103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30422232 + ... + 30458368.

It is an arithmetic number, because the mean of its divisors is an integer number (36169668934).

Almost surely, 2^{1100021121100} is an apocalyptic number.

1100021121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100021121100 is an abundant number, since it is smaller than the sum of its proper divisors (1504195042148).

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

1100021121100 is a wasteful number, since it uses less digits than its factorization.

1100021121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63835 (or 63828 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1100021121100 its reverse (11211200011), we get a palindrome (1111232321111).

The spelling of 1100021121100 in words is "one trillion, one hundred billion, twenty-one million, one hundred twenty-one thousand, one hundred".