1101120200021 has 4 divisors (see below), whose sum is σ = 1101300688044. Its totient is φ = 1100939712000.

The previous prime is 1101120200009. The next prime is 1101120200027. The reversal of 1101120200021 is 1200020211011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 568350132100 + 532770067921 = 753890^2 + 729911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101120200021 - 2³⁸ = 826242293077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1101120199975 and 1101120200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101120200027) 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, 90234860 + ... + 90247061.

It is an arithmetic number, because the mean of its divisors is an integer number (275325172011).

Almost surely, 2^{1101120200021} is an apocalyptic number.

It is an amenable number.

1101120200021 is a deficient number, since it is larger than the sum of its proper divisors (180488023).

1101120200021 is an equidigital number, since it uses as much as digits as its factorization.

1101120200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180488022.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1101120200021 its reverse (1200020211011), we get a palindrome (2301140411032).

The spelling of 1101120200021 in words is "one trillion, one hundred one billion, one hundred twenty million, two hundred thousand, twenty-one".