1101100121220 has 48 divisors (see below), whose sum is σ = 3363360372288. Its totient is φ = 266933362560.

The previous prime is 1101100121207. The next prime is 1101100121309. The reversal of 1101100121220 is 221210011011.

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 = 1101100121196 and 1101100121205.

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, 834166099 + ... + 834167418.

It is an arithmetic number, because the mean of its divisors is an integer number (70070007756).

Almost surely, 2^{1101100121220} is an apocalyptic number.

1101100121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101100121220 is an abundant number, since it is smaller than the sum of its proper divisors (2262260251068).

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

1101100121220 is a wasteful number, since it uses less digits than its factorization.

1101100121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668333540 (or 1668333538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1101100121220 its reverse (221210011011), we get a palindrome (1322310132231).

The spelling of 1101100121220 in words is "one trillion, one hundred one billion, one hundred million, one hundred twenty-one thousand, two hundred twenty".