1100020018121 has 2 divisors, whose sum is σ = 1100020018122. Its totient is φ = 1100020018120.

The previous prime is 1100020018081. The next prime is 1100020018187. The reversal of 1100020018121 is 1218100200011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012840960000 + 87179058121 = 1006400^2 + 295261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100020018121 - 2³⁰ = 1098946276297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100020018121.

It is not a weakly prime, because it can be changed into another prime (1100020018021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010009060 + 550010009061.

It is an arithmetic number, because the mean of its divisors is an integer number (550010009061).

Almost surely, 2^{1100020018121} is an apocalyptic number.

It is an amenable number.

1100020018121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100020018121 is an equidigital number, since it uses as much as digits as its factorization.

1100020018121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1100020018121 its reverse (1218100200011), we get a palindrome (2318120218132).

The spelling of 1100020018121 in words is "one trillion, one hundred billion, twenty million, eighteen thousand, one hundred twenty-one".