1100110120021 has 4 divisors (see below), whose sum is σ = 1200120130944. Its totient is φ = 1000100109100.

The previous prime is 1100110119961. The next prime is 1100110120033. The reversal of 1100110120021 is 1200210110011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1100110120021 - 2²⁷ = 1099975902293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100110120621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50005005445 + ... + 50005005466.

It is an arithmetic number, because the mean of its divisors is an integer number (300030032736).

Almost surely, 2^{1100110120021} is an apocalyptic number.

1100110120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100110120021 is a deficient number, since it is larger than the sum of its proper divisors (100010010923).

1100110120021 is a wasteful number, since it uses less digits than its factorization.

1100110120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100010010922.

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

Adding to 1100110120021 its reverse (1200210110011), we get a palindrome (2300320230032).

The spelling of 1100110120021 in words is "one trillion, one hundred billion, one hundred ten million, one hundred twenty thousand, twenty-one".