1100020020121 has 4 divisors (see below), whose sum is σ = 1200021840144. Its totient is φ = 1000018200100.

The previous prime is 1100020020101. The next prime is 1100020020133. The reversal of 1100020020121 is 1210200200011.

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 1100020020121 - 2¹¹ = 1100020018073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100020020098 and 1100020020107.

It is not an unprimeable number, because it can be changed into a prime (1100020020101) 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, 50000909995 + ... + 50000910016.

It is an arithmetic number, because the mean of its divisors is an integer number (300005460036).

Almost surely, 2^{1100020020121} is an apocalyptic number.

1100020020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100020020121 is a deficient number, since it is larger than the sum of its proper divisors (100001820023).

1100020020121 is a wasteful number, since it uses less digits than its factorization.

1100020020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100001820022.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1100020020121 its reverse (1210200200011), we get a palindrome (2310220220132).

The spelling of 1100020020121 in words is "one trillion, one hundred billion, twenty million, twenty thousand, one hundred twenty-one".